diff --git a/src/api/utils/tradeQuoter.ts b/src/api/utils/tradeQuoter.ts
index 20e5beb..e62a4e1 100644
--- a/src/api/utils/tradeQuoter.ts
+++ b/src/api/utils/tradeQuoter.ts
@@ -354,7 +354,10 @@ export class TradeQuoter {
     decimals: number,
     coinPrices: CoinGeckoCoinPrices
   ): string {
-    const coinPrice = coinPrices[address][USD_CURRENCY_CODE];
+    const coinPrice = (coinPrices[address])
+      ? coinPrices[address][USD_CURRENCY_CODE]
+      : 0;
+
     const normalizedAmount = this.normalizeTokenAmount(amount, decimals) * coinPrice;
     return new Intl.NumberFormat('en-US', {style: 'currency', currency: 'USD'}).format(normalizedAmount);
   }
@@ -375,7 +378,11 @@ export class TradeQuoter {
   ): string {
     const totalGasCost = this.totalGasCost(gasPrice, gas);
     const chainCurrencyAddress = this.chainCurrencyAddress(chainId);
-    const coinPrice = coinPrices[chainCurrencyAddress][USD_CURRENCY_CODE];
+
+    const coinPrice = (coinPrices[chainCurrencyAddress])
+      ? coinPrices[chainCurrencyAddress][USD_CURRENCY_CODE]
+      : 0;
+
     const cost = totalGasCost * coinPrice;
 
     // Polygon prices are low - using 4 significant digits here so something besides zero appears
@@ -439,13 +446,23 @@ export class TradeQuoter {
     toTokenDecimals: number,
     coinPrices: CoinGeckoCoinPrices
   ): string {
-    const fromTokenPriceUsd = coinPrices[fromTokenAddress][USD_CURRENCY_CODE];
-    const toTokenPriceUsd = coinPrices[toTokenAddress][USD_CURRENCY_CODE];
+    const fromTokenPriceUsd = (coinPrices[fromTokenAddress])
+      ? (coinPrices[fromTokenAddress])[USD_CURRENCY_CODE]
+      : 0;
+
+    const toTokenPriceUsd = (coinPrices[toTokenAddress])
+      ? coinPrices[toTokenAddress][USD_CURRENCY_CODE]
+      : 0;
 
     const fromTokenTotalUsd = this.normalizeTokenAmount(fromTokenAmount, fromTokenDecimals) * fromTokenPriceUsd;
     const toTokenTotalUsd = this.normalizeTokenAmount(toTokenAmount, toTokenDecimals) * toTokenPriceUsd;
 
-    const slippageRaw = (fromTokenTotalUsd - toTokenTotalUsd) / fromTokenTotalUsd;
+    let slippageRaw = (fromTokenTotalUsd - toTokenTotalUsd) / fromTokenTotalUsd;
+
+    if (isNaN(slippageRaw)) {
+      slippageRaw = 0;
+    }
+
     return this.formatAsPercentage(slippageRaw * 100);
   }
 
diff --git a/test/api/TradeQuoter.spec.ts b/test/api/TradeQuoter.spec.ts
index 7700827..6b58704 100644
--- a/test/api/TradeQuoter.spec.ts
+++ b/test/api/TradeQuoter.spec.ts
@@ -56,6 +56,7 @@ axios.get.mockImplementation(val => {
     case fixture.coinGeckoTokenRequestEth: return fixture.coinGeckoTokenResponseEth;
     case fixture.coinGeckoTokenRequestPoly: return fixture.coinGeckoTokenResponsePoly;
     case fixture.coinGeckoPricesRequestEth: return fixture.coinGeckoPricesResponseEth;
+    case fixture.coinGeckoPricesRequestEthEmpty: return fixture.coinGeckoPricesResponseEmpty;
     case fixture.coinGeckoPricesRequestPoly: return fixture.coinGeckoPricesResponsePoly;
     case fixture.quickswapRequestPoly: return fixture.quickswapResponsePoly;
   }
@@ -151,6 +152,19 @@ describe('TradeQuoter', () => {
         const quote = await subject();
         expect(quote).to.be.deep.equal(fixture.setTradeQuoteEth);
       });
+
+      describe('when coingecko does not return a price', () => {
+        // Empty quote expects these duplicate tokens (they must be components on Set)
+        beforeEach(() => {
+          subjectFromToken = '0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2';
+          subjectToToken = '0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2';
+        });
+
+        it('should generate a trade quote correctly', async () => {
+          const quote = await subject();
+          expect(quote).to.be.deep.equal(fixture.setTradeQuoteEmptyPrice);
+        });
+      });
     });
   });
 
diff --git a/test/fixtures/tradeQuote.ts b/test/fixtures/tradeQuote.ts
index b09f8c9..a44d423 100644
--- a/test/fixtures/tradeQuote.ts
+++ b/test/fixtures/tradeQuote.ts
@@ -162,6 +162,11 @@ export const tradeQuoteFixtures = {
     },
   },
 
+  coinGeckoPricesRequestEthEmpty: 'https://api.coingecko.com/api/v3/simple/token_price/ethereum?contract_addresses=0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2,0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2,0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2&vs_currencies=usd,usd,usd',
+  coinGeckoPricesResponseEmpty: {
+    data: {},
+  },
+
   coinGeckoPricesRequestPoly: 'https://api.coingecko.com/api/v3/simple/token_price/polygon-pos?contract_addresses=0x0d500b1d8e8ef31e21c99d1db9a6444d3adf1270,0x2791bca1f2de4661ed88a30c99a7a9449aa84174,0x1bfd67037b42cf73acf2047067bd4f2c47d9bfd6&vs_currencies=usd,usd,usd',
   coinGeckoPricesResponsePoly: {
     data: {
@@ -308,4 +313,31 @@ export const tradeQuoteFixtures = {
        feePercentage: '0.00%',
        slippage: '1.11%' },
   },
+
+  setTradeQuoteEmptyPrice: {
+    from: '0x1494ca1f11d487c2bbe4543e90080aeba4ba3c2b',
+    fromTokenAddress: '0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2',
+    toTokenAddress: '0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2',
+    exchangeAdapterName: 'ZeroExApiAdapterV4',
+    calldata: '0x415565b00000000000000000000000009f8f72aa9304c8b593d555f12ef6589cc3a579a2',
+    gas: '315000',
+    gasPrice: '61',
+    slippagePercentage: '2.00%',
+    fromTokenAmount: '1126868991563',
+    toTokenAmount: '90314741816',
+    display: {
+      inputAmountRaw: '.5',
+      inputAmount: '500000000000000000',
+      quoteAmount: '499999999999793729',
+      fromTokenDisplayAmount: '0.4999999999997937',
+      toTokenDisplayAmount: '0.04131269116050703',
+      fromTokenPriceUsd: '$0.00',
+      toTokenPriceUsd: '$0.00',
+      gasCostsUsd: '$0.00',
+      gasCostsChainCurrency: '0.0192150 ETH',
+      feePercentage: '1.00%',
+      slippage: '0.00%',
+    },
+  },
+
 };