diff --git a/oracle/market_mapper.go b/oracle/market_mapper.go
index 5ed171551..8e1083a7a 100644
--- a/oracle/market_mapper.go
+++ b/oracle/market_mapper.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"os"
+	"strings"
 	"time"
 
 	"go.uber.org/zap"
@@ -42,8 +43,31 @@ func (o *OracleImpl) listenForMarketMapUpdates(ctx context.Context) {
 				continue
 			}
 
+			if o.lastUpdated != 0 && o.lastUpdated == result.Value.LastUpdated {
+				o.logger.Debug("skipping market map update on no lastUpdated change", zap.Uint64("lastUpdated", o.lastUpdated))
+				continue
+			}
+
+			validSubset, err := result.Value.MarketMap.GetValidSubset()
+			if err != nil {
+				o.logger.Error("failed to validate market map", zap.Error(err))
+				continue
+			}
+
+			// Detect removed markets and surface info about the removals
+			var removedMarkets []string
+			for t := range result.Value.MarketMap.Markets {
+				if _, in := validSubset.Markets[t]; !in {
+					removedMarkets = append(removedMarkets, t)
+				}
+			}
+			if len(validSubset.Markets) == 0 || len(validSubset.Markets) != len(result.Value.MarketMap.Markets) {
+				o.logger.Warn("invalid market map update has caused some markets to be removed")
+				o.logger.Info("markets removed from invalid market map", zap.String("markets", strings.Join(removedMarkets, " ")))
+			}
+
 			// Update the oracle with the latest market map iff the market map has changed.
-			updated := result.Value.MarketMap
+			updated := validSubset
 			if o.marketMap.Equal(updated) {
 				o.logger.Debug("market map has not changed")
 				continue
@@ -55,12 +79,15 @@ func (o *OracleImpl) listenForMarketMapUpdates(ctx context.Context) {
 				continue
 			}
 
+			o.lastUpdated = result.Value.GetLastUpdated()
+
 			// Write the market map to the configured path.
 			if err := o.WriteMarketMap(); err != nil {
 				o.logger.Error("failed to write market map", zap.Error(err))
 			}
 
-			o.logger.Info("updated oracle with new market map", zap.Any("market_map", updated))
+			o.logger.Info("updated oracle with new market map")
+			o.logger.Debug("updated oracle with new market map", zap.Any("market_map", updated))
 		}
 	}
 }
diff --git a/oracle/market_mapper_test.go b/oracle/market_mapper_test.go
index 506300d87..507e138f7 100644
--- a/oracle/market_mapper_test.go
+++ b/oracle/market_mapper_test.go
@@ -296,4 +296,46 @@ func TestListenForMarketMapUpdates(t *testing.T) {
 		// Clean up the file.
 		require.NoError(t, os.Remove(path))
 	})
+	t.Run("can update providers with a new market map and handle partially invalid state", func(t *testing.T) {
+		chains := []mmclienttypes.Chain{{ChainID: "dYdX"}}
+		handler, factory := marketMapperFactory(t, chains)
+		handler.On("CreateURL", mock.Anything).Return("", nil).Maybe()
+
+		resolved := make(mmclienttypes.ResolvedMarketMap)
+		resp := mmtypes.MarketMapResponse{
+			MarketMap: partialInvalidMarketMap,
+		}
+		resolved[chains[0]] = mmclienttypes.NewMarketMapResult(&resp, time.Now())
+		handler.On("ParseResponse", mock.Anything, mock.Anything).Return(mmclienttypes.NewMarketMapResponse(resolved, nil)).Maybe()
+
+		o, err := oracle.New(
+			oracleCfgWithMockMapper,
+			noOpPriceAggregator{},
+			oracle.WithLogger(logger),
+			oracle.WithMarketMapperFactory(factory),
+			oracle.WithPriceAPIQueryHandlerFactory(oraclefactory.APIQueryHandlerFactory),
+			oracle.WithPriceWebSocketQueryHandlerFactory(oraclefactory.WebSocketQueryHandlerFactory),
+		)
+		require.NoError(t, err)
+
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+
+		go func() {
+			err := o.Start(ctx)
+			if !errors.Is(err, context.Canceled) {
+				t.Errorf("Start() should have returned context.Canceled error")
+			}
+		}()
+
+		// Wait for the oracle to start.
+		time.Sleep(5000 * time.Millisecond)
+
+		// The oracle should have been updated.
+		require.Equal(t, validMarketMapSubset, o.GetMarketMap())
+
+		// Stop the oracle.
+		cancel()
+		o.Stop()
+	})
 }
diff --git a/oracle/oracle.go b/oracle/oracle.go
index 4a7e1a10e..914c983f5 100644
--- a/oracle/oracle.go
+++ b/oracle/oracle.go
@@ -54,6 +54,8 @@ type OracleImpl struct { //nolint:revive
 	cfg config.OracleConfig
 	// marketMap is the market map that the oracle is using.
 	marketMap mmtypes.MarketMap
+	// lastUpdated is the field in the marketmap module tracking the last block at which an update was posted
+	lastUpdated uint64
 	// writeTo is a path to write the market map to.
 	writeTo string
 
diff --git a/oracle/update.go b/oracle/update.go
index 56b74d224..097a3da56 100644
--- a/oracle/update.go
+++ b/oracle/update.go
@@ -19,19 +19,14 @@ func (o *OracleImpl) UpdateMarketMap(marketMap mmtypes.MarketMap) error {
 	o.mut.Lock()
 	defer o.mut.Unlock()
 
-	validSubset, err := marketMap.GetValidSubset()
-	if err != nil {
+	if err := marketMap.ValidateBasic(); err != nil {
 		o.logger.Error("failed to validate market map", zap.Error(err))
 		return err
 	}
 
-	if len(validSubset.Markets) == 0 {
-		o.logger.Warn("market map update produced no valid markets to fetch")
-	}
-
 	// Iterate over all existing price providers and update their market maps.
 	for name, state := range o.priceProviders {
-		providerTickers, err := types.ProviderTickersFromMarketMap(name, validSubset)
+		providerTickers, err := types.ProviderTickersFromMarketMap(name, marketMap)
 		if err != nil {
 			o.logger.Error("failed to create provider market map", zap.String("provider", name), zap.Error(err))
 			return err
@@ -47,7 +42,7 @@ func (o *OracleImpl) UpdateMarketMap(marketMap mmtypes.MarketMap) error {
 		o.priceProviders[name] = updatedState
 	}
 
-	o.marketMap = validSubset
+	o.marketMap = marketMap
 	if o.aggregator != nil {
 		o.aggregator.UpdateMarketMap(o.marketMap)
 	}
diff --git a/oracle/update_test.go b/oracle/update_test.go
index 3dd182b80..b19990038 100644
--- a/oracle/update_test.go
+++ b/oracle/update_test.go
@@ -18,7 +18,7 @@ import (
 )
 
 func TestUpdateWithMarketMap(t *testing.T) {
-	t.Run("bad market map is not rejected", func(t *testing.T) {
+	t.Run("bad market map is rejected", func(t *testing.T) {
 		orc, err := oracle.New(
 			oracleCfg,
 			noOpPriceAggregator{},
@@ -35,7 +35,7 @@ func TestUpdateWithMarketMap(t *testing.T) {
 				"bad": {},
 			},
 		})
-		require.NoError(t, err)
+		require.Error(t, err)
 
 		o.Stop()
 	})
@@ -626,60 +626,4 @@ func TestUpdateProviderState(t *testing.T) {
 			500*time.Millisecond,
 		)
 	})
-
-	t.Run("can update the market map with partial failure on NormalizeBy", func(t *testing.T) {
-		orc, err := oracle.New(
-			oracleCfg,
-			noOpPriceAggregator{},
-			oracle.WithLogger(logger),
-			oracle.WithPriceAPIQueryHandlerFactory(oraclefactory.APIQueryHandlerFactory),
-			oracle.WithPriceWebSocketQueryHandlerFactory(oraclefactory.WebSocketQueryHandlerFactory),
-		)
-		require.NoError(t, err)
-		o := orc.(*oracle.OracleImpl)
-		require.NoError(t, o.Init(context.TODO()))
-
-		providers := o.GetProviderState()
-		require.Len(t, providers, 3)
-
-		// Update the oracle's market map.
-		require.NoError(t, o.UpdateMarketMap(partialInvalidMarketMap))
-
-		providers = o.GetProviderState()
-
-		cbTickers, err := types.ProviderTickersFromMarketMap(coinbase.Name, validMarketMapSubset)
-		require.NoError(t, err)
-
-		// Check the state after the update.
-		coinbaseState, ok := providers[coinbase.Name]
-		require.True(t, ok)
-		checkProviderState(
-			t,
-			cbTickers,
-			coinbase.Name,
-			providertypes.API,
-			false,
-			coinbaseState,
-		)
-
-		okxTickers, err := types.ProviderTickersFromMarketMap(okx.Name, validMarketMapSubset)
-		require.NoError(t, err)
-
-		okxState, ok := providers[okx.Name]
-		require.True(t, ok)
-		checkProviderState(
-			t,
-			okxTickers,
-			okx.Name,
-			providertypes.WebSockets,
-			false,
-			okxState,
-		)
-
-		binanceState, ok := providers[binance.Name]
-		require.True(t, ok)
-		checkProviderState(t, nil, binance.Name, providertypes.API, false, binanceState)
-
-		o.Stop()
-	})
 }
diff --git a/providers/apis/marketmap/fetcher.go b/providers/apis/marketmap/fetcher.go
index be54b9cdc..7182c3825 100644
--- a/providers/apis/marketmap/fetcher.go
+++ b/providers/apis/marketmap/fetcher.go
@@ -122,25 +122,6 @@ func (f *MarketMapFetcher) Fetch(
 		)
 	}
 
-	// Validate the market map response.
-	//
-	// TODO: Add checks on the chain ID.
-	if err := resp.MarketMap.ValidateBasic(); err != nil {
-		f.logger.Info(
-			"invalid market map response from module",
-			zap.Any("market_map", resp.MarketMap),
-			zap.Error(err),
-		)
-
-		return types.NewMarketMapResponseWithErr(
-			chains,
-			providertypes.NewErrorWithCode(
-				fmt.Errorf("invalid market map response: %w", err),
-				providertypes.ErrorInvalidResponse,
-			),
-		)
-	}
-
 	resolved := make(types.ResolvedMarketMap)
 	resolved[chains[0]] = types.NewMarketMapResult(resp, time.Now())
 
diff --git a/providers/apis/marketmap/fetcher_test.go b/providers/apis/marketmap/fetcher_test.go
index f13644ca9..094203d49 100644
--- a/providers/apis/marketmap/fetcher_test.go
+++ b/providers/apis/marketmap/fetcher_test.go
@@ -120,22 +120,28 @@ func TestFetch(t *testing.T) {
 			},
 		},
 		{
-			name:   "errors when the market map response is invalid",
+			name:   "does not error when the market map response is invalid",
 			chains: chains[:1],
 			client: func() mmtypes.QueryClient {
 				c := mocks.NewQueryClient(t)
 				c.On("MarketMap", mock.Anything, mock.Anything).Return(
 					&mmtypes.MarketMapResponse{
-						MarketMap: badMarketMap,
+						MarketMap:   badMarketMap,
+						ChainId:     chains[0].ChainID,
+						LastUpdated: 11,
 					},
 					nil,
 				)
 				return c
 			},
 			expected: types.MarketMapResponse{
-				UnResolved: types.UnResolvedMarketMap{
-					chains[0]: providertypes.UnresolvedResult{
-						ErrorWithCode: providertypes.NewErrorWithCode(fmt.Errorf("invalid market map response"), providertypes.ErrorAPIGeneral),
+				Resolved: types.ResolvedMarketMap{
+					chains[0]: types.MarketMapResult{
+						Value: &mmtypes.MarketMapResponse{
+							MarketMap:   badMarketMap,
+							ChainId:     chains[0].ChainID,
+							LastUpdated: 11,
+						},
 					},
 				},
 			},