diff --git a/.gitignore b/.gitignore
index fe5bedc..1b36483 100644
--- a/.gitignore
+++ b/.gitignore
@@ -91,3 +91,4 @@ docs/_build/
 .so
 .dll
 
+_test
diff --git a/Cargo.lock b/Cargo.lock
index 04924ac..9c15d4f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -19,9 +19,9 @@ checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
 [[package]]
 name = "ahash"
-version = "0.8.6"
+version = "0.8.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91429305e9f0a25f6205c5b8e0d2db09e0708a7a6df0f42212bb56c32c8ac97a"
+checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
 dependencies = [
  "cfg-if",
  "getrandom",
@@ -77,9 +77,9 @@ dependencies = [
 
 [[package]]
 name = "argminmax"
-version = "0.6.1"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "202108b46429b765ef483f8a24d5c46f48c14acfdacc086dd4ab6dddf6bcdbd2"
+checksum = "52424b59d69d69d5056d508b260553afd91c57e21849579cd1f50ee8b8b88eaa"
 dependencies = [
  "num-traits",
 ]
@@ -115,7 +115,7 @@ checksum = "16e62a023e7c117e27523144c5d2459f4397fcc3cab0085af8e2224f643a0193"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
@@ -126,7 +126,7 @@ checksum = "c980ee35e870bd1a4d2c8294d4c04d0499e67bca1e4b5cefcc693c2fa00caea9"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
@@ -179,9 +179,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.4.1"
+version = "2.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
+checksum = "ed570934406eb16438a4e976b1b4500774099c13b8cb96eec99f620f05090ddf"
 
 [[package]]
 name = "brotli"
@@ -206,28 +206,28 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.14.0"
+version = "3.15.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f30e7476521f6f8af1a1c4c0b8cc94f0bee37d91763d0ca2665f299b6cd8aec"
+checksum = "7ff69b9dd49fd426c69a0db9fc04dd934cdb6645ff000864d98f7e2af8830eaa"
 
 [[package]]
 name = "bytemuck"
-version = "1.14.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "374d28ec25809ee0e23827c2ab573d729e293f281dfe393500e7ad618baa61c6"
+checksum = "5d6d68c57235a3a081186990eca2867354726650f42f7516ca50c28d6281fd15"
 dependencies = [
  "bytemuck_derive",
 ]
 
 [[package]]
 name = "bytemuck_derive"
-version = "1.5.0"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "965ab7eb5f8f97d2a083c799f3a1b994fc397b2fe2da5d1da1626ce15a39f2b1"
+checksum = "4da9a32f3fed317401fa3c862968128267c3106685286e15d5aaa3d7389c2f60"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
@@ -244,9 +244,9 @@ checksum = "a2bd12c1caf447e69cd4528f47f94d203fd2582878ecb9e9465484c4148a8223"
 
 [[package]]
 name = "cc"
-version = "1.0.83"
+version = "1.0.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0"
+checksum = "8cd6604a82acf3039f1144f54b8eb34e91ffba622051189e71b781822d5ee1f5"
 dependencies = [
  "jobserver",
  "libc",
@@ -260,21 +260,21 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chrono"
-version = "0.4.31"
+version = "0.4.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f2c685bad3eb3d45a01354cedb7d5faa66194d1d58ba6e267a8de788f79db38"
+checksum = "8eaf5903dcbc0a39312feb77df2ff4c76387d591b9fc7b04a238dcf8bb62639a"
 dependencies = [
  "android-tzdata",
  "iana-time-zone",
  "num-traits",
- "windows-targets 0.48.5",
+ "windows-targets 0.52.4",
 ]
 
 [[package]]
 name = "chrono-tz"
-version = "0.8.5"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91d7b79e99bfaa0d47da0687c43aa3b7381938a62ad3a6498599039321f660b7"
+checksum = "d59ae0466b83e838b81a54256c39d5d7c20b9d7daa10510a242d9b75abd5936e"
 dependencies = [
  "chrono",
  "chrono-tz-build",
@@ -306,9 +306,9 @@ dependencies = [
 
 [[package]]
 name = "core-foundation-sys"
-version = "0.8.4"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"
+checksum = "06ea2b9bc92be3c2baa9334a323ebca2d6f074ff852cd1d7b11064035cd3868f"
 
 [[package]]
 name = "crc32fast"
@@ -321,56 +321,46 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.8"
+version = "0.5.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a33c2bf77f2df06183c3aa30d1e96c0695a313d4f9c453cc3762a6db39f99200"
+checksum = "ab3db02a9c5b5121e1e42fbdb1aeb65f5e02624cc58c43f2884c6ccac0b82f95"
 dependencies = [
- "cfg-if",
  "crossbeam-utils",
 ]
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.8.3"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce6fd6f855243022dcecf8702fef0c297d4338e226845fe067f6341ad9fa0cef"
+checksum = "613f8cc01fe9cf1a3eb3d7f488fd2fa8388403e97039e2f73692932e291a770d"
 dependencies = [
- "cfg-if",
  "crossbeam-epoch",
  "crossbeam-utils",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.15"
+version = "0.9.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae211234986c545741a7dc064309f67ee1e5ad243d0e48335adc0484d960bcc7"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
 dependencies = [
- "autocfg",
- "cfg-if",
  "crossbeam-utils",
- "memoffset",
- "scopeguard",
 ]
 
 [[package]]
 name = "crossbeam-queue"
-version = "0.3.8"
+version = "0.3.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d1cfb3ea8a53f37c40dea2c7bedcbd88bdfae54f5e2175d6ecaff1c988353add"
+checksum = "df0346b5d5e76ac2fe4e327c5fd1118d6be7c51dfb18f9b7922923f287471e35"
 dependencies = [
- "cfg-if",
  "crossbeam-utils",
 ]
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.16"
+version = "0.8.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a22b2d63d4d1dc0b7f1b6b2747dd0088008a9be28b6ddf0b1e7d335e3037294"
-dependencies = [
- "cfg-if",
-]
+checksum = "248e3bacc7dc6baa3b21e405ee045c3047101a49145e7e9eca583ab4c2ca5345"
 
 [[package]]
 name = "crossterm"
@@ -378,7 +368,7 @@ version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f476fe445d41c9e991fd07515a6f463074b782242ccf4a5b7b1d1012e70824df"
 dependencies = [
- "bitflags 2.4.1",
+ "bitflags 2.4.2",
  "crossterm_winapi",
  "libc",
  "parking_lot",
@@ -394,17 +384,23 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "cusip"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12a2525debe63fd4756220e103a8200bf74d02b2367451964868aa48ad1d3376"
+
 [[package]]
 name = "dyn-clone"
-version = "1.0.16"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "545b22097d44f8a9581187cdf93de7a71e4722bf51200cfaba810865b49a495d"
+checksum = "0d6ef0072f8a535281e4876be788938b528e9a1d43900b82c2569af7da799125"
 
 [[package]]
 name = "either"
-version = "1.9.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
+checksum = "11157ac094ffbdde99aa67b23417ebdd801842852b500e395a45a9c0aac03e4a"
 
 [[package]]
 name = "enum_dispatch"
@@ -415,7 +411,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
@@ -523,7 +519,7 @@ checksum = "87750cf4b7a4c0625b1529e4c543c2182106e4dedc60a2a6455e00d212c489ac"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
@@ -558,9 +554,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.10"
+version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be4136b2a15dd319360be1c07d9933517ccf0be8f16bf62a3bee4f0d618df427"
+checksum = "190092ea657667030ac6a35e305e62fc4dd69fd98ac98631e5d3a2b1575a12b5"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -583,9 +579,9 @@ checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
 
 [[package]]
 name = "hashbrown"
-version = "0.14.2"
+version = "0.14.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f93e7192158dbcda357bdec5fb5788eebf8bbac027f3f33e719d29135ae84156"
+checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
 dependencies = [
  "ahash",
  "allocator-api2",
@@ -600,9 +596,9 @@ checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
 [[package]]
 name = "hermit-abi"
-version = "0.3.6"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd5256b483761cd23699d0da46cc6fd2ee3be420bbe6d020ae4a091e70b7e9fd"
+checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
 [[package]]
 name = "hex"
@@ -612,25 +608,25 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "home"
-version = "0.5.5"
+version = "0.5.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5444c27eef6923071f7ebcc33e3444508466a76f7a2b93da00ed6e19f30c1ddb"
+checksum = "e3d1354bf6b7235cb4a0576c2619fd4ed18183f689b12b006a0ee7329eeff9a5"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
 name = "iana-time-zone"
-version = "0.1.58"
+version = "0.1.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8326b86b6cff230b97d0d312a6c40a60726df3332e721f72a1b035f451663b20"
+checksum = "e7ffbb5a1b541ea2561f8c41c087286cc091e21e556a4f09a8f6cbf17b69b141"
 dependencies = [
  "android_system_properties",
  "core-foundation-sys",
  "iana-time-zone-haiku",
  "js-sys",
  "wasm-bindgen",
- "windows-core 0.51.1",
+ "windows-core",
 ]
 
 [[package]]
@@ -663,9 +659,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.1.0"
+version = "2.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
+checksum = "7b0b929d511467233429c45a44ac1dcaa21ba0f5ba11e4879e6ed28ddb4f9df4"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -691,9 +687,9 @@ checksum = "c397ca3ea05ad509c4ec451fea28b4771236a376ca1c69fd5143aae0cf8f93c4"
 
 [[package]]
 name = "itoa"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af150ab688ff2122fcef229be89cb50dd66af9e01a4ff320cc137eecc9bacc38"
+checksum = "b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"
 
 [[package]]
 name = "itoap"
@@ -723,27 +719,27 @@ dependencies = [
 
 [[package]]
 name = "jobserver"
-version = "0.1.27"
+version = "0.1.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c37f63953c4c63420ed5fd3d6d398c719489b9f872b9fa683262f8edd363c7d"
+checksum = "ab46a6e9526ddef3ae7f787c06f0f2600639ba80ea3eade3d8e670a2230f51d6"
 dependencies = [
  "libc",
 ]
 
 [[package]]
 name = "js-sys"
-version = "0.3.65"
+version = "0.3.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "54c0c35952f67de54bb584e9fd912b3023117cbafc0a77d8f3dee1fb5f572fe8"
+checksum = "29c15563dc2726973df627357ce0c9ddddbea194836909d655df6a75d2cf296d"
 dependencies = [
  "wasm-bindgen",
 ]
 
 [[package]]
 name = "libc"
-version = "0.2.150"
+version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89d92a4743f9a61002fae18374ed11e7973f530cb3a3255fb354818118b2203c"
+checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
 [[package]]
 name = "libm"
@@ -773,9 +769,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.20"
+version = "0.4.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
+checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
 [[package]]
 name = "lz4"
@@ -799,9 +795,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.6.4"
+version = "2.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
 
 [[package]]
 name = "memmap2"
@@ -841,20 +837,20 @@ dependencies = [
 
 [[package]]
 name = "mio"
-version = "0.8.10"
+version = "0.8.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f3d0b296e374a4e6f3c7b0a1f5a51d748a0d34c85e7dc48fc3fa9a87657fe09"
+checksum = "a4a650543ca06a924e8b371db273b2756685faae30f8487da1b56505a8f78b0c"
 dependencies = [
  "libc",
  "wasi",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
 name = "multiversion"
-version = "0.7.3"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2c7b9d7fe61760ce5ea19532ead98541f6b4c495d87247aff9826445cf6872a"
+checksum = "c4851161a11d3ad0bf9402d90ffc3967bf231768bfd7aeb61755ad06dbf1a142"
 dependencies = [
  "multiversion-macros",
  "target-features",
@@ -862,9 +858,9 @@ dependencies = [
 
 [[package]]
 name = "multiversion-macros"
-version = "0.7.3"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26a83d8500ed06d68877e9de1dde76c1dbb83885dcdbda4ef44ccbc3fbda2ac8"
+checksum = "79a74ddee9e0c27d2578323c13905793e91622148f138ba29738f9dddb835e90"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -903,19 +899,18 @@ dependencies = [
 
 [[package]]
 name = "num-integer"
-version = "0.1.45"
+version = "0.1.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
 dependencies = [
- "autocfg",
  "num-traits",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.2.17"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39e3200413f237f41ab11ad6d161bc7239c84dcb631773ccd7de3dfe4b5c267c"
+checksum = "da0df0e5185db44f69b44f26786fe401b6c293d1907744beaa7fa62b2e5a517a"
 dependencies = [
  "autocfg",
  "libm",
@@ -942,9 +937,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.18.0"
+version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "parking_lot"
@@ -1046,9 +1041,9 @@ checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
 [[package]]
 name = "pkg-config"
-version = "0.3.27"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26072860ba924cbfa98ea39c8c19b4dd6a4a25423dbdf219c1eca91aa0cf6964"
+checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
 [[package]]
 name = "planus"
@@ -1061,9 +1056,9 @@ dependencies = [
 
 [[package]]
 name = "polars"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3a26ef94cfedd5915da990a0b4740cca17b5854bd44a8e8c741fe732c02aac37"
+checksum = "d87445e8bc147ecd69f9c2347eb04d9ffddecddbd745e14df983a76ab16a344d"
 dependencies = [
  "getrandom",
  "polars-arrow",
@@ -1081,9 +1076,9 @@ dependencies = [
 
 [[package]]
 name = "polars-arrow"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48e71d30a9fa503bc3baaff3b4c48f08d402c442a50ea7fb9d475ce7b575425a"
+checksum = "9d43b8f7aa78c9c158b9ca61246c425b4145b44ba96c948b8aea539b308c97e6"
 dependencies = [
  "ahash",
  "atoi",
@@ -1127,9 +1122,9 @@ dependencies = [
 
 [[package]]
 name = "polars-compute"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26342dea46502e8a3322f484062869c2fa49185d512bce4fb44f350b559b4eae"
+checksum = "2f6ac10fd22183c1ff65e4e423499dac1136416af16d608f26519ef29252a1fe"
 dependencies = [
  "bytemuck",
  "either",
@@ -1143,12 +1138,12 @@ dependencies = [
 
 [[package]]
 name = "polars-core"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99e0885a8f1bd1f4d928f5eaa852825bf647b6b5e21e171b6af838f77b6565f3"
+checksum = "bbd8653734085eaa028976b97d57ff9bbf78e582438b31f1916f828323e27211"
 dependencies = [
  "ahash",
- "bitflags 2.4.1",
+ "bitflags 2.4.2",
  "bytemuck",
  "chrono",
  "chrono-tz",
@@ -1175,9 +1170,9 @@ dependencies = [
 
 [[package]]
 name = "polars-error"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d259d905c17d8e8b2de1eadc94dc4186bf1d325f1be81b4087afea22a6f753d6"
+checksum = "402eb509a2feca529eca47c2b6fbb1c50133149ee7b872be4111e8998f872060"
 dependencies = [
  "polars-arrow-format",
  "regex",
@@ -1187,9 +1182,9 @@ dependencies = [
 
 [[package]]
 name = "polars-ffi"
-version = "0.38.0"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9969f2e241140ae666ebabf56cb035666afc62aedd0de09edb933f771b0ff37"
+checksum = "d56ff5c91a901f33e549593cb95fc60cbd8b342f0f2dbfc9e61882e785600360"
 dependencies = [
  "polars-arrow",
  "polars-core",
@@ -1197,9 +1192,9 @@ dependencies = [
 
 [[package]]
 name = "polars-io"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45f694b918ba2ee7e6f13e8415598f94009c390a9e61c95e6b9c26c8fe1a1a54"
+checksum = "6e4d3a2256f03a14aaf7abcb1c0c3c4bebec35d7a8e4f6582b37aa7608fa3d46"
 dependencies = [
  "ahash",
  "async-trait",
@@ -1232,12 +1227,12 @@ dependencies = [
 
 [[package]]
 name = "polars-lazy"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56e3b40272d24142bcecb2979b19ec8d8c1a14036cb3cea09ce8fb8a4a43bcde"
+checksum = "72cbad937091f85e73c72aac845ed9388560eb7110ffbd8c4ffcb39f57dcf933"
 dependencies = [
  "ahash",
- "bitflags 2.4.1",
+ "bitflags 2.4.2",
  "glob",
  "once_cell",
  "polars-arrow",
@@ -1255,9 +1250,9 @@ dependencies = [
 
 [[package]]
 name = "polars-ops"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd5bad61c2fa1977eb65bb719f12d4f68b908edf1106b91b3ab9615f9df8843e"
+checksum = "15ba4d4ffd2b84308c62b786f42d176be1d94c56a42a37336fd373a4dd835830"
 dependencies = [
  "ahash",
  "argminmax",
@@ -1285,9 +1280,9 @@ dependencies = [
 
 [[package]]
 name = "polars-parquet"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06d84fb9b005a19ca523406df371d9329466ae87df48922d0d3d8955072502a4"
+checksum = "0d60f130159e45a01e3be04e091447d25b99eaf54047dcc35e1e272dae51d3fa"
 dependencies = [
  "ahash",
  "async-stream",
@@ -1311,9 +1306,9 @@ dependencies = [
 
 [[package]]
 name = "polars-pipe"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58097bef7208a5b833c4d832d948026854917b4a219d55ab1779eb36b59fac0f"
+checksum = "ff3fc341a7dc9892560798756caed5e61299de26266b4fd1aab9a4f7dde55a11"
 dependencies = [
  "crossbeam-channel",
  "crossbeam-queue",
@@ -1336,9 +1331,9 @@ dependencies = [
 
 [[package]]
 name = "polars-plan"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56493c0e13aaccfcae59985db34da30cd4893e57edc9715d8688c96d7e911d47"
+checksum = "b6d488369d49b1e5ed47d80fc1063a1aee6488d3d2e95b03034c26125e6c4734"
 dependencies = [
  "ahash",
  "bytemuck",
@@ -1361,9 +1356,9 @@ dependencies = [
 
 [[package]]
 name = "polars-row"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7def6f9fc14fbfc0550bad615a757f3e1d86c00983c5ff23166fcdf205438d51"
+checksum = "d65278c78db5e2b12acab42b1362a8541bd73c716bb71799fb525a88c4839254"
 dependencies = [
  "bytemuck",
  "polars-arrow",
@@ -1373,9 +1368,9 @@ dependencies = [
 
 [[package]]
 name = "polars-sql"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f9d7de9dca8170a20b6c4cb7bafaf724abe88e807646bc3c2e98f13a34a7c4c"
+checksum = "fa0c3899dc60dbdb45c23198116fa254441062450dfcecc030761798de539afd"
 dependencies = [
  "hex",
  "polars-arrow",
@@ -1391,9 +1386,9 @@ dependencies = [
 
 [[package]]
 name = "polars-time"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "162c815c3cb0f859da40f056c8a0a9c4247900e1275702ae399192ea60acac2a"
+checksum = "1bae6e6012718991ed0d192a85b7b568bef636c5e1027a05dc428892d270e33a"
 dependencies = [
  "atoi",
  "chrono",
@@ -1411,9 +1406,9 @@ dependencies = [
 
 [[package]]
 name = "polars-utils"
-version = "0.38.1"
+version = "0.38.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fca7938ee789314ac92a0bf6c1c4e5eaeb5e428241df2519fd70f21dba49194"
+checksum = "38411c9dce645036c796f473389a0368b2affa4d8d270d663146a02fbcbf9952"
 dependencies = [
  "ahash",
  "bytemuck",
@@ -1433,6 +1428,7 @@ dependencies = [
 name = "polars_istr"
 version = "0.1.0"
 dependencies = [
+ "cusip",
  "iban_validate",
  "isin",
  "jemallocator",
@@ -1443,6 +1439,12 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "portable-atomic"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7170ef9988bc169ba16dd36a7fa041e5c4cbeb6a35b76d4c03daded371eae7c0"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"
@@ -1451,24 +1453,25 @@ checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.78"
+version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
+checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "pyo3"
-version = "0.20.0"
+version = "0.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04e8453b658fe480c3e70c8ed4e3d3ec33eb74988bd186561b0cc66b85c3bc4b"
+checksum = "53bdbb96d49157e65d45cc287af5f32ffadd5f4761438b527b055fb0d4bb8233"
 dependencies = [
  "cfg-if",
  "indoc",
  "libc",
  "memoffset",
  "parking_lot",
+ "portable-atomic",
  "pyo3-build-config",
  "pyo3-ffi",
  "pyo3-macros",
@@ -1477,9 +1480,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.20.0"
+version = "0.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a96fe70b176a89cff78f2fa7b3c930081e163d5379b4dcdf993e3ae29ca662e5"
+checksum = "deaa5745de3f5231ce10517a1f5dd97d53e5a2fd77aa6b5842292085831d48d7"
 dependencies = [
  "once_cell",
  "target-lexicon",
@@ -1487,9 +1490,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.20.0"
+version = "0.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "214929900fd25e6604661ed9cf349727c8920d47deff196c4e28165a6ef2a96b"
+checksum = "62b42531d03e08d4ef1f6e85a2ed422eb678b8cd62b762e53891c05faf0d4afa"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -1497,26 +1500,27 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.20.0"
+version = "0.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dac53072f717aa1bfa4db832b39de8c875b7c7af4f4a6fe93cdbf9264cf8383b"
+checksum = "7305c720fa01b8055ec95e484a6eca7a83c841267f0dd5280f0c8b8551d2c158"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.20.0"
+version = "0.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7774b5a8282bd4f25f803b1f0d945120be959a36c72e08e7cd031c792fdfd424"
+checksum = "7c7e9b68bb9c3149c5b0cade5d07f953d6d125eb4337723c4ccdb665f1f96185"
 dependencies = [
  "heck",
  "proc-macro2",
+ "pyo3-build-config",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
@@ -1547,7 +1551,7 @@ dependencies = [
  "polars-plan",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
@@ -1605,7 +1609,7 @@ version = "11.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d86a7c4638d42c44551f4791a20e687dbb4c3de1f33c43dd71e355cd429def1"
 dependencies = [
- "bitflags 2.4.1",
+ "bitflags 2.4.2",
 ]
 
 [[package]]
@@ -1639,9 +1643,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.10.2"
+version = "1.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
+checksum = "b62dbe01f0b06f9d8dc7d49e05a0785f153b00b2c227856282f671e0318c9b15"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1651,9 +1655,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.3"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
+checksum = "86b83b8b9847f9bf95ef68afb0b8e6cdb80f498442f5179a29fad448fcc1eaea"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1680,9 +1684,9 @@ checksum = "7ffc183a10b4478d04cbbbfc96d0873219d962dd5accaff2ffbd4ceb7df837f4"
 
 [[package]]
 name = "ryu"
-version = "1.0.15"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ad4cc8da4ef723ed60bced201181d83791ad433213d8c24efffda1eec85d741"
+checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
 
 [[package]]
 name = "scopeguard"
@@ -1698,9 +1702,9 @@ checksum = "a3f0bf26fd526d2a95683cd0f87bf103b8539e2ca1ef48ce002d67aad59aa0b4"
 
 [[package]]
 name = "serde"
-version = "1.0.191"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a834c4821019838224821468552240d4d95d14e751986442c816572d39a080c9"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
@@ -1720,20 +1724,20 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.191"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46fa52d5646bce91b680189fe5b1c049d2ea38dabb4e2e7c8d00ca12cfbfbcfd"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.108"
+version = "1.0.114"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d1c7e3eac408d115102c4c24ad393e0821bb3a5df4d506a80f85f7a742a526b"
+checksum = "c5f09b1bd632ef549eaa9f60a1f8de742bdbc698e6cee2095fc84dde5f549ae0"
 dependencies = [
  "itoa",
  "ryu",
@@ -1763,9 +1767,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.11.2"
+version = "1.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4dccd0940a2dcdf68d092b8cbab7dc0ad8fa938bf95787e1b916b0e3d0e8e970"
+checksum = "e6ecd384b10a64542d77071bd64bd7b231f4ed5940fba55e98c3de13824cf3d7"
 
 [[package]]
 name = "smartstring"
@@ -1786,12 +1790,12 @@ checksum = "1b6b67fb9a61334225b5b790716f609cd58395f895b3fe8b328786812a40bc3b"
 
 [[package]]
 name = "socket2"
-version = "0.5.5"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b5fac59a5cb5dd637972e5fca70daf0523c9067fcdc4842f053dae04a18f8e9"
+checksum = "05ffd9c0a93b7543e062e759284fcf5f5e3b098501104bfbdde4d404db792871"
 dependencies = [
  "libc",
- "windows-sys",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -1846,7 +1850,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
@@ -1862,9 +1866,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.48"
+version = "2.0.52"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f3531638e407dfc0814761abb7c00a5b54992b849452a0646b7f65c9f770f3f"
+checksum = "b699d15b36d1f02c3e7c69f8ffef53de37aefae075d8488d4ba1a7788d574a07"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1873,9 +1877,9 @@ dependencies = [
 
 [[package]]
 name = "sysinfo"
-version = "0.30.3"
+version = "0.30.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba2dbd2894d23b2d78dae768d85e323b557ac3ac71a5d917a31536d8f77ebada"
+checksum = "0c385888ef380a852a16209afc8cfad22795dd8873d69c9a14d2e2088f118d18"
 dependencies = [
  "cfg-if",
  "core-foundation-sys",
@@ -1887,34 +1891,34 @@ dependencies = [
 
 [[package]]
 name = "target-features"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cfb5fa503293557c5158bd215fdc225695e567a77e453f5d4452a50a193969bd"
+checksum = "c1bbb9f3c5c463a01705937a24fdabc5047929ac764b2d5b9cf681c1f5041ed5"
 
 [[package]]
 name = "target-lexicon"
-version = "0.12.12"
+version = "0.12.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14c39fd04924ca3a864207c66fc2cd7d22d7c016007f9ce846cbb9326331930a"
+checksum = "e1fc403891a21bcfb7c37834ba66a547a8f402146eba7265b5a6d88059c9ff2f"
 
 [[package]]
 name = "thiserror"
-version = "1.0.56"
+version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d54378c645627613241d077a3a79db965db602882668f9136ac42af9ecb730ad"
+checksum = "03468839009160513471e86a034bb2c5c0e4baae3b43f79ffc55c4a5427b3297"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.56"
+version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa0faa943b50f3db30a20aa7e265dbc66076993efed8463e8de414e5d06d3471"
+checksum = "c61f3ba182994efc43764a46c018c347bc492c79f024e705f46567b418f6d4f7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
@@ -1945,7 +1949,7 @@ dependencies = [
  "num_cpus",
  "pin-project-lite",
  "socket2",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -1984,18 +1988,18 @@ dependencies = [
 
 [[package]]
 name = "unicode-reverse"
-version = "1.0.8"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bea5dacebb0d2d0a69a6700a05b59b3908bf801bf563a49bd27a1b60122962c"
+checksum = "4b6f4888ebc23094adfb574fdca9fdc891826287a6397d2cd28802ffd6f20c76"
 dependencies = [
  "unicode-segmentation",
 ]
 
 [[package]]
 name = "unicode-segmentation"
-version = "1.10.1"
+version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1dd624098567895118886609431a7c3b8f516e41d30e0643f03d94592a147e36"
+checksum = "d4c87d22b6e3f4a18d4d40ef354e97c90fcb14dd91d7dc0aa9d8a1172ebf7202"
 
 [[package]]
 name = "unicode-width"
@@ -2043,9 +2047,9 @@ checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.88"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7daec296f25a1bae309c0cd5c29c4b260e510e6d813c286b19eaadf409d40fce"
+checksum = "4be2531df63900aeb2bca0daaaddec08491ee64ceecbee5076636a3b026795a8"
 dependencies = [
  "cfg-if",
  "wasm-bindgen-macro",
@@ -2053,24 +2057,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.88"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e397f4664c0e4e428e8313a469aaa58310d302159845980fd23b0f22a847f217"
+checksum = "614d787b966d3989fa7bb98a654e369c762374fd3213d212cfc0251257e747da"
 dependencies = [
  "bumpalo",
  "log",
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.88"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5961017b3b08ad5f3fe39f1e79877f8ee7c23c5e5fd5eb80de95abc41f1f16b2"
+checksum = "a1f8823de937b71b9460c0c34e25f3da88250760bec0ebac694b49997550d726"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -2078,22 +2082,22 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.88"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c5353b8dab669f5e10f5bd76df26a9360c748f054f862ff5f3f8aae0c7fb3907"
+checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.88"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d046c5d029ba91a1ed14da14dca44b68bf2f124cfbaf741c54151fdb3e0750b"
+checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
 
 [[package]]
 name = "winapi"
@@ -2123,17 +2127,8 @@ version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e48a53791691ab099e5e2ad123536d0fff50652600abaf43bbf952894110d0be"
 dependencies = [
- "windows-core 0.52.0",
- "windows-targets 0.52.0",
-]
-
-[[package]]
-name = "windows-core"
-version = "0.51.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1f8cf84f35d2db49a46868f947758c7a1138116f7fac3bc844f43ade1292e64"
-dependencies = [
- "windows-targets 0.48.5",
+ "windows-core",
+ "windows-targets 0.52.4",
 ]
 
 [[package]]
@@ -2142,7 +2137,7 @@ version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
 dependencies = [
- "windows-targets 0.52.0",
+ "windows-targets 0.52.4",
 ]
 
 [[package]]
@@ -2154,6 +2149,15 @@ dependencies = [
  "windows-targets 0.48.5",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets 0.52.4",
+]
+
 [[package]]
 name = "windows-targets"
 version = "0.48.5"
@@ -2171,17 +2175,17 @@ dependencies = [
 
 [[package]]
 name = "windows-targets"
-version = "0.52.0"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a18201040b24831fbb9e4eb208f8892e1f50a37feb53cc7ff887feb8f50e7cd"
+checksum = "7dd37b7e5ab9018759f893a1952c9420d060016fc19a472b4bb20d1bdd694d1b"
 dependencies = [
- "windows_aarch64_gnullvm 0.52.0",
- "windows_aarch64_msvc 0.52.0",
- "windows_i686_gnu 0.52.0",
- "windows_i686_msvc 0.52.0",
- "windows_x86_64_gnu 0.52.0",
- "windows_x86_64_gnullvm 0.52.0",
- "windows_x86_64_msvc 0.52.0",
+ "windows_aarch64_gnullvm 0.52.4",
+ "windows_aarch64_msvc 0.52.4",
+ "windows_i686_gnu 0.52.4",
+ "windows_i686_msvc 0.52.4",
+ "windows_x86_64_gnu 0.52.4",
+ "windows_x86_64_gnullvm 0.52.4",
+ "windows_x86_64_msvc 0.52.4",
 ]
 
 [[package]]
@@ -2192,9 +2196,9 @@ checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
 
 [[package]]
 name = "windows_aarch64_gnullvm"
-version = "0.52.0"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb7764e35d4db8a7921e09562a0304bf2f93e0a51bfccee0bd0bb0b666b015ea"
+checksum = "bcf46cf4c365c6f2d1cc93ce535f2c8b244591df96ceee75d8e83deb70a9cac9"
 
 [[package]]
 name = "windows_aarch64_msvc"
@@ -2204,9 +2208,9 @@ checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
 
 [[package]]
 name = "windows_aarch64_msvc"
-version = "0.52.0"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbaa0368d4f1d2aaefc55b6fcfee13f41544ddf36801e793edbbfd7d7df075ef"
+checksum = "da9f259dd3bcf6990b55bffd094c4f7235817ba4ceebde8e6d11cd0c5633b675"
 
 [[package]]
 name = "windows_i686_gnu"
@@ -2216,9 +2220,9 @@ checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
 
 [[package]]
 name = "windows_i686_gnu"
-version = "0.52.0"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a28637cb1fa3560a16915793afb20081aba2c92ee8af57b4d5f28e4b3e7df313"
+checksum = "b474d8268f99e0995f25b9f095bc7434632601028cf86590aea5c8a5cb7801d3"
 
 [[package]]
 name = "windows_i686_msvc"
@@ -2228,9 +2232,9 @@ checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
 
 [[package]]
 name = "windows_i686_msvc"
-version = "0.52.0"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffe5e8e31046ce6230cc7215707b816e339ff4d4d67c65dffa206fd0f7aa7b9a"
+checksum = "1515e9a29e5bed743cb4415a9ecf5dfca648ce85ee42e15873c3cd8610ff8e02"
 
 [[package]]
 name = "windows_x86_64_gnu"
@@ -2240,9 +2244,9 @@ checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
 
 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.52.0"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d6fa32db2bc4a2f5abeacf2b69f7992cd09dca97498da74a151a3132c26befd"
+checksum = "5eee091590e89cc02ad514ffe3ead9eb6b660aedca2183455434b93546371a03"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
@@ -2252,9 +2256,9 @@ checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
-version = "0.52.0"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a657e1e9d3f514745a572a6846d3c7aa7dbe1658c056ed9c3344c4109a6949e"
+checksum = "77ca79f2451b49fa9e2af39f0747fe999fcda4f5e241b2898624dca97a1f2177"
 
 [[package]]
 name = "windows_x86_64_msvc"
@@ -2264,34 +2268,34 @@ checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
 
 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.52.0"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
+checksum = "32b752e52a2da0ddfbdbcc6fceadfeede4c939ed16d13e648833a61dfb611ed8"
 
 [[package]]
 name = "xxhash-rust"
-version = "0.8.7"
+version = "0.8.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9828b178da53440fa9c766a3d2f73f7cf5d0ac1fe3980c1e5018d899fd19e07b"
+checksum = "927da81e25be1e1a2901d59b81b37dd2efd1fc9c9345a55007f09bf5a2d3ee03"
 
 [[package]]
 name = "zerocopy"
-version = "0.7.25"
+version = "0.7.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8cd369a67c0edfef15010f980c3cbe45d7f651deac2cd67ce097cd801de16557"
+checksum = "74d4d3961e53fa4c9a25a8637fc2bfaf2595b3d3ae34875568a5cf64787716be"
 dependencies = [
  "zerocopy-derive",
 ]
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.7.25"
+version = "0.7.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2f140bda219a26ccc0cdb03dba58af72590c53b22642577d88a927bc5c87d6b"
+checksum = "9ce1b18ccd8e73a9321186f97e46f9f04b778851177567b1975109d26a08d2a6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.52",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index f78bf1d..4ef5c8d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,6 +15,7 @@ pyo3-polars = {version = "0.12", features = ["derive"]}
 polars = {version = "0.38.1", features = ["performant", "lazy", "nightly", "parquet"]}
 iban_validate = "4.0.1"
 isin = "0.1.18"
+cusip = "0.3.0"
 url = "2.5.0"
 
 [target.'cfg(any(not(target_os = "linux"), use_mimalloc))'.dependencies]
diff --git a/python/polars_istr/__init__.py b/python/polars_istr/__init__.py
index f2b0d5f..f560028 100644
--- a/python/polars_istr/__init__.py
+++ b/python/polars_istr/__init__.py
@@ -1,6 +1,7 @@
 from .iban import IbanExt  # noqa: E402
 from .isin import IsinExt  # noqa: E402
+from .cusip import CusipExt  # noqa: E402
 from .url import UrlExt  # noqa: E402
 
 __version__ = "0.1.0"
-__all__ = ["IbanExt", "IsinExt", "UrlExt"]
+__all__ = ["IbanExt", "IsinExt", "CusipExt", "UrlExt"]
diff --git a/python/polars_istr/cusip.py b/python/polars_istr/cusip.py
new file mode 100644
index 0000000..cdd3b57
--- /dev/null
+++ b/python/polars_istr/cusip.py
@@ -0,0 +1,149 @@
+from __future__ import annotations
+import polars as pl
+from polars.utils.udfs import _get_shared_lib_location
+
+_lib = _get_shared_lib_location(__file__)
+
+
+@pl.api.register_expr_namespace("cusip")
+class CusipExt:
+    """
+    This class contains tools for parsing CUSIP/CINS and Extended CINS format data.
+
+    Polars Namespace: cusip
+
+    Example: pl.col("cusip_cins_string").cusip.country_code()
+    """
+
+    def __init__(self, expr: pl.Expr):
+        self._expr: pl.Expr = expr
+
+    def extract_all(self) -> pl.Expr:
+        """
+        Returns a struct containing country_code, issue_num, issuer_num, check_digit,
+        or null, if it cannot be parsed.
+
+        Country Code is null for valid CUSIPs which are not (extended) CINS
+        """
+        return self._expr.register_plugin(
+            lib=_lib,
+            symbol="pl_cusip_full",
+            is_elementwise=True,
+        )
+
+    def issue_num(self) -> pl.Expr:
+        """
+        Returns the issue number from the CUSIP, or null if it cannot be parsed.
+        """
+        return self._expr.register_plugin(
+            lib=_lib,
+            symbol="pl_cusip_issue_num",
+            is_elementwise=True,
+        )
+
+    def issuer_num(self) -> pl.Expr:
+        """
+        Returns the issuer number from the CUSIP, or null if it cannot be parsed.
+        """
+        return self._expr.register_plugin(
+            lib=_lib,
+            symbol="pl_cusip_issuer_num",
+            is_elementwise=True,
+        )
+
+    def check_digit(self) -> pl.Expr:
+        """
+        Returns check digit from the CUSIP, or null if it cannot be parsed.
+        """
+        return self._expr.register_plugin(
+            lib=_lib,
+            symbol="pl_cusip_check_digit",
+            is_elementwise=True,
+        )
+
+    def country_code(self) -> pl.Expr:
+        """
+        Returns the country code from the CUSIP, or null if it cannot be parsed.
+        """
+        return self._expr.register_plugin(
+            lib=_lib,
+            symbol="pl_cusip_country_code",
+            is_elementwise=True,
+        )
+
+    def payload(self) -> pl.Expr:
+        """
+        Returns the payload (CUSIP ex. check digit) from the CUSIP, or null if it
+        cannot be parsed.
+        """
+        return self._expr.register_plugin(
+            lib=_lib,
+            symbol="pl_cusip_payload",
+            is_elementwise=True,
+        )
+
+    def is_private_issue(self) -> pl.Expr:
+        """
+        Returns true if the issue number is reserved for private use.
+        """
+        return self._expr.register_plugin(
+            lib=_lib,
+            symbol="pl_cusip_is_private_issue",
+            is_elementwise=True,
+        )
+
+    def has_private_issuer(self) -> pl.Expr:
+        """
+        Returns true if the issuer is reserved for private use.
+        """
+        return self._expr.register_plugin(
+            lib=_lib,
+            symbol="pl_cusip_has_private_issuer",
+            is_elementwise=True,
+        )
+
+    def is_private_use(self) -> pl.Expr:
+        """
+        Returns True if either the issuer or issue number is reserved for
+        private use.
+        """
+        return self._expr.register_plugin(
+            lib=_lib, symbol="pl_cusip_is_private_use", is_elementwise=True
+        )
+
+    def is_cins(self) -> pl.Expr:
+        """
+        Returns true if this CUSIP number is actually a
+        CUSIP International Numbering System (CINS) number,
+        false otherwise (i.e., that it has a letter as the first character of its issuer number).
+        See also is_cins_base() and is_cins_extended().
+
+        Null if unable to parse.
+        """
+        return self._expr.register_plugin(lib=_lib, symbol="pl_cusip_is_cins", is_elementwise=True)
+
+    def is_cins_base(self) -> pl.Expr:
+        """
+        Returns true if this CUSIP identifier is actually a CUSIP International
+        Numbering System (CINS) identifier (with the further restriction that
+        it does not use ‘I’, ‘O’ or ‘Z’ as its country code), false otherwise.
+        See also is_cins() and is_cins_extended().
+
+        Null if unable to parse.
+        """
+        return self._expr.register_plugin(
+            lib=_lib, symbol="pl_cusip_is_cins_base", is_elementwise=True
+        )
+
+    def is_cins_extended(self) -> pl.Expr:
+        """
+        Returns true if this CUSIP identifier is actually a CUSIP International
+        Numbering System (CINS) identifier (with the further restriction that
+        it does not use ‘I’, ‘O’ or ‘Z’ as its country code), false otherwise.
+        See also is_cins() and is_cins_extended().
+
+        Null if unable to parse.
+        """
+        return self._expr.register_plugin(
+            lib=_lib, symbol="pl_cusip_is_cins_extended", is_elementwise=True
+        )
diff --git a/python/polars_istr/iban.py b/python/polars_istr/iban.py
index 029aae6..1bf1da3 100644
--- a/python/polars_istr/iban.py
+++ b/python/polars_istr/iban.py
@@ -7,7 +7,6 @@
 
 @pl.api.register_expr_namespace("iban")
 class IbanExt:
-
     """
     This class contains tools for parsing IBAN format data.
 
diff --git a/python/polars_istr/isin.py b/python/polars_istr/isin.py
index 3457be4..9bc1c9b 100644
--- a/python/polars_istr/isin.py
+++ b/python/polars_istr/isin.py
@@ -7,7 +7,6 @@
 
 @pl.api.register_expr_namespace("isin")
 class IsinExt:
-
     """
     This class contains tools for parsing ISIN format data.
 
diff --git a/python/polars_istr/url.py b/python/polars_istr/url.py
index b27ec6e..3fb001d 100644
--- a/python/polars_istr/url.py
+++ b/python/polars_istr/url.py
@@ -7,7 +7,6 @@
 
 @pl.api.register_expr_namespace("url")
 class UrlExt:
-
     """
     This class contains tools for parsing URL strings.
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index f91e9de..5d56faf 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,2 +1,2 @@
 [toolchain]
-channel = "nightly-2024-01-24"
\ No newline at end of file
+channel = "nightly"
diff --git a/src/cusip_parsing/mod.rs b/src/cusip_parsing/mod.rs
new file mode 100644
index 0000000..1355bfa
--- /dev/null
+++ b/src/cusip_parsing/mod.rs
@@ -0,0 +1,316 @@
+use cusip::CUSIP;
+use polars::prelude::*;
+use pyo3_polars::derive::polars_expr;
+
+fn cusip_full_output(_: &[Field]) -> PolarsResult<Field> {
+    let cc = Field::new("country_code", DataType::String);
+    let issuer = Field::new("issuer", DataType::String);
+    let issue = Field::new("issue", DataType::String);
+    let cd = Field::new("check_digit", DataType::String);
+
+    let v: Vec<Field> = vec![cc, issuer, issue, cd];
+    Ok(Field::new("", DataType::Struct(v)))
+}
+
+#[polars_expr(output_type_func=cusip_full_output)]
+fn pl_cusip_full(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut cc_builder = StringChunkedBuilder::new("country_code", ca.len());
+    let mut ir_builder = StringChunkedBuilder::new("issuer", ca.len());
+    let mut is_builder = StringChunkedBuilder::new("issue", ca.len());
+    let mut cd_builder = StringChunkedBuilder::new("check_digit", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                if let Some(cins) = cusip.as_cins() {
+                    cc_builder.append_value(cins.country_code().to_string());
+                    ir_builder.append_value(cusip.issuer_num());
+                    is_builder.append_value(cusip.issue_num());
+                    cd_builder.append_value(cusip.check_digit().to_string());
+                } else {
+                    cc_builder.append_null();
+                    ir_builder.append_value(cusip.issuer_num());
+                    is_builder.append_value(cusip.issue_num());
+                    cd_builder.append_value(cusip.check_digit().to_string());
+                }
+            } else {
+                cc_builder.append_null();
+                ir_builder.append_null();
+                is_builder.append_null();
+                cd_builder.append_null();
+            }
+        } else {
+            cc_builder.append_null();
+            ir_builder.append_null();
+            is_builder.append_null();
+            cd_builder.append_null();
+        }
+    });
+    let cc = cc_builder.finish().into_series();
+    let ir = ir_builder.finish().into_series();
+    let is = is_builder.finish().into_series();
+    let cd = cd_builder.finish().into_series();
+
+    let out = StructChunked::new("cusip", &[cc, ir, is, cd])?;
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=String)]
+fn pl_cusip_issue_num(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut s_builder = StringChunkedBuilder::new("issue_num", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                s_builder.append_value(cusip.issue_num());
+            } else {
+                s_builder.append_null();
+            }
+        } else {
+            s_builder.append_null();
+        }
+    });
+
+    let out = s_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=String)]
+fn pl_cusip_issuer_num(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut s_builder = StringChunkedBuilder::new("issuer_num", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                if let Some(cins) = cusip.as_cins() {
+                    s_builder.append_value(cins.issuer_num());
+                } else {
+                    s_builder.append_value(cusip.issuer_num());
+                }
+            } else {
+                s_builder.append_null();
+            }
+        } else {
+            s_builder.append_null();
+        }
+    });
+
+    let out = s_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=String)]
+fn pl_cusip_country_code(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut s_builder = StringChunkedBuilder::new("country_code", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                if let Some(cins) = cusip.as_cins(){
+                    s_builder.append_value(cins.country_code().to_string());
+                } else {
+                    s_builder.append_null();
+                }
+            } else {
+                s_builder.append_null();
+            }
+        } else {
+            s_builder.append_null();
+        }
+    });
+
+    let out = s_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=String)]
+fn pl_cusip_check_digit(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut s_builder = StringChunkedBuilder::new("check_digit", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                s_builder.append_value(cusip.check_digit().to_string());
+            } else {
+                s_builder.append_null();
+            }
+        } else {
+            s_builder.append_null();
+        }
+    });
+
+    let out = s_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=String)]
+fn pl_cusip_payload(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut s_builder = StringChunkedBuilder::new("check_digit", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                s_builder.append_value(cusip.payload());
+            } else {
+                s_builder.append_null();
+            }
+        } else {
+            s_builder.append_null();
+        }
+    });
+
+    let out = s_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=Boolean)]
+fn pl_cusip_is_private_issue(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut b_builder = BooleanChunkedBuilder::new("is_private_issue", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                b_builder.append_value(cusip.is_private_issue());
+            } else {
+                b_builder.append_null()
+            }
+        } else {
+            b_builder.append_null();
+        }
+    });
+
+    let out = b_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=Boolean)]
+fn pl_cusip_has_private_issuer(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut b_builder = BooleanChunkedBuilder::new("has_private_issuer", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                b_builder.append_value(cusip.has_private_issuer());
+            } else {
+                b_builder.append_null()
+            }
+        } else {
+            b_builder.append_null();
+        }
+    });
+
+    let out = b_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=Boolean)]
+fn pl_cusip_is_private_use(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut b_builder = BooleanChunkedBuilder::new("is_private_use", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                b_builder.append_value(cusip.is_private_use());
+            } else {
+                b_builder.append_null()
+            }
+        } else {
+            b_builder.append_null();
+        }
+    });
+
+    let out = b_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=Boolean)]
+fn pl_cusip_is_cins(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut b_builder = BooleanChunkedBuilder::new("is_cins", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                b_builder.append_value(cusip.is_cins());
+            } else {
+                b_builder.append_null()
+            }
+        } else {
+            b_builder.append_null();
+        }
+    });
+
+    let out = b_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=Boolean)]
+fn pl_cusip_is_cins_base(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut b_builder = BooleanChunkedBuilder::new("is_cins_base", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                if let Some(cins) = cusip.as_cins() {
+                    b_builder.append_value(cins.is_base());
+                } else {
+                    b_builder.append_null();
+                }
+            } else {
+                b_builder.append_null();
+            }
+        } else {
+            b_builder.append_null();
+        }
+    });
+
+    let out = b_builder.finish();
+    Ok(out.into_series())
+}
+
+#[polars_expr(output_type=Boolean)]
+fn pl_cusip_is_cins_extended(inputs: &[Series]) -> PolarsResult<Series> {
+    let ca = inputs[0].str()?;
+
+    let mut b_builder = BooleanChunkedBuilder::new("is_cins_extended", ca.len());
+
+    ca.into_iter().for_each(|op_s| {
+        if let Some(s) = op_s {
+            if let Ok(cusip) = CUSIP::parse(s) {
+                if let Some(cins) = cusip.as_cins() {
+                    b_builder.append_value(cins.is_extended());
+                } else {
+                    b_builder.append_null();
+                }
+            } else {
+                b_builder.append_null()
+            }
+        } else {
+            b_builder.append_null();
+        }
+    });
+
+    let out = b_builder.finish();
+    Ok(out.into_series())
+}
diff --git a/src/isin_parsing/mod.rs b/src/isin_parsing/mod.rs
index 553a7f5..31c4d08 100644
--- a/src/isin_parsing/mod.rs
+++ b/src/isin_parsing/mod.rs
@@ -1,4 +1,3 @@
-use isin;
 use polars::prelude::*;
 use pyo3_polars::derive::polars_expr;
 
diff --git a/src/lib.rs b/src/lib.rs
index 9dab5b2..a6fb197 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,4 @@
+mod cusip_parsing;
 mod iban_parsing;
 mod isin_parsing;
 mod url_parsing;
diff --git a/tests/test_correctness.py b/tests/test_correctness.py
index e0b15bc..68c812b 100644
--- a/tests/test_correctness.py
+++ b/tests/test_correctness.py
@@ -1,4 +1,11 @@
-from __future__ import annotations
+import polars as pl
+
+
+from polars.testing import assert_frame_equal
+
+from typing import List
+
+import pytest
 
 import pytest
 import polars as pl
@@ -9,6 +16,107 @@
 from typing import List, Optional
 
 
+# There are no valid test cases for Extended CINS or Private Issue(r) since I could not
+# find any existing cusips readily available (including in the cusip crate).
+# If anyone has encountered one and would like it added to the tests, please raise an
+# issue.
+@pytest.mark.parametrize(
+    """df, issue_num, issuer_num, check_digit, country_code,
+    payload, is_private_issue, has_private_issuer, is_private_use, is_cins,
+    is_cins_base, is_cins_extended""",
+    [
+        (
+            pl.DataFrame(
+                {
+                    "cusip": [
+                        "303075105",  # regular cusip (FactSet - Common Stock)
+                        "30307510",  # regular cusip ex. check digit
+                        "G0052B105",  # regular CINS (Abingdon Capital PLC - Shares)
+                        "HELLOWORLD",  # Invalid
+                    ]
+                }
+            ),
+            ["10", None, "10", None],
+            ["303075", None, "0052B", None],
+            ["5", None, "5", None],
+            [None, None, "G", None],
+            ["30307510", None, "G0052B10", None],
+            [False, None, False, None],
+            [False, None, False, None],
+            [False, None, False, None],
+            [False, None, True, None],
+            [
+                None,
+                None,
+                True,
+                None,
+            ],  # TODO for these last 2, should regular cusips return False or None?
+            [None, None, False, None],
+        )
+    ],
+)
+def test_cusip(
+    df: pl.DataFrame,
+    issue_num: List[str],
+    issuer_num: List[str],
+    check_digit: List[str],
+    country_code: List[str],
+    payload: List[str],
+    is_private_issue: List[str],
+    has_private_issuer: List[str],
+    is_private_use: List[str],
+    is_cins: List[str],
+    is_cins_base: List[str],
+    is_cins_extended: List[str],
+):
+    test1 = df.select(
+        pl.col("cusip").cusip.issue_num().alias("issue_num"),
+        pl.col("cusip").cusip.issuer_num().alias("issuer_num"),
+        pl.col("cusip").cusip.check_digit().alias("check_digit"),
+        pl.col("cusip").cusip.country_code().alias("country_code"),
+        pl.col("cusip").cusip.payload().alias("payload"),
+        pl.col("cusip").cusip.is_private_issue().alias("is_private_issue"),
+        pl.col("cusip").cusip.has_private_issuer().alias("has_private_issuer"),
+        pl.col("cusip").cusip.is_private_use().alias("is_private_use"),
+        pl.col("cusip").cusip.is_cins().alias("is_cins"),
+        pl.col("cusip").cusip.is_cins_base().alias("is_cins_base"),
+        pl.col("cusip").cusip.is_cins_extended().alias("is_cins_extended"),
+    )
+
+    test2 = (
+        df.lazy()
+        .select(
+            pl.col("cusip").cusip.issue_num().alias("issue_num"),
+            pl.col("cusip").cusip.issuer_num().alias("issuer_num"),
+            pl.col("cusip").cusip.check_digit().alias("check_digit"),
+            pl.col("cusip").cusip.country_code().alias("country_code"),
+            pl.col("cusip").cusip.payload().alias("payload"),
+            pl.col("cusip").cusip.is_private_issue().alias("is_private_issue"),
+            pl.col("cusip").cusip.has_private_issuer().alias("has_private_issuer"),
+            pl.col("cusip").cusip.is_private_use().alias("is_private_use"),
+            pl.col("cusip").cusip.is_cins().alias("is_cins"),
+            pl.col("cusip").cusip.is_cins_base().alias("is_cins_base"),
+            pl.col("cusip").cusip.is_cins_extended().alias("is_cins_extended"),
+        )
+        .collect()
+    )
+    ans = pl.DataFrame(
+        {
+            "issue_num": issue_num,
+            "issuer_num": issuer_num,
+            "check_digit": check_digit,
+            "country_code": country_code,
+            "payload": payload,
+            "is_private_issue": is_private_issue,
+            "has_private_issuer": has_private_issuer,
+            "is_private_use": is_private_use,
+            "is_cins": is_cins,
+            "is_cins_base": is_cins_base,
+            "is_cins_extended": is_cins_extended,
+        }
+    )
+
+
 @pytest.mark.parametrize(
     "df, cc, cd, reason, is_valid, bban, bank_id, branch_id",
     [