diff --git a/core/src/exchanges/kalshi/fetcher.ts b/core/src/exchanges/kalshi/fetcher.ts
index ceceb3c2..1da5730a 100644
--- a/core/src/exchanges/kalshi/fetcher.ts
+++ b/core/src/exchanges/kalshi/fetcher.ts
@@ -41,7 +41,6 @@ export interface KalshiRawMarket {
 export interface KalshiRawEvent {
     event_ticker: string;
     title: string;
-    mututals_description?: string;
     image_url?: string;
     category?: string;
     tags?: string[];
diff --git a/core/src/exchanges/kalshi/normalizer.ts b/core/src/exchanges/kalshi/normalizer.ts
index f6e2eed2..efd04398 100644
--- a/core/src/exchanges/kalshi/normalizer.ts
+++ b/core/src/exchanges/kalshi/normalizer.ts
@@ -106,7 +106,7 @@ export class KalshiNormalizer implements IExchangeNormalizer<KalshiRawEvent, Kal
         return {
             id: raw.event_ticker,
             title: raw.title,
-            description: raw.mututals_description || this.deriveEventDescription(raw.markets || []),
+            description: this.deriveEventDescription(raw.markets || []),
             slug: raw.event_ticker,
             markets,
             volume24h: markets.reduce((sum, m) => sum + m.volume24h, 0),
diff --git a/core/test/normalizers/exchange-normalizers.test.ts b/core/test/normalizers/exchange-normalizers.test.ts
index 3f46eb79..cdfee92c 100644
--- a/core/test/normalizers/exchange-normalizers.test.ts
+++ b/core/test/normalizers/exchange-normalizers.test.ts
@@ -398,7 +398,6 @@ describe('KalshiNormalizer', () => {
     const rawEvent: Readonly<KalshiRawEvent> = freeze({
         event_ticker: 'FED-25JAN29',
         title: 'Fed Funds Rate Decision - January 2025',
-        mututals_description: 'Markets on the Federal Reserve interest rate decision.',
         image_url: 'https://kalshi.com/img/fed.png',
         category: 'Economics',
         tags: ['Federal Reserve', 'Interest Rates'],
@@ -593,8 +592,8 @@ describe('KalshiNormalizer', () => {
             expect(event.title).toBe('Fed Funds Rate Decision - January 2025');
         });
 
-        it('maps description from mututals_description', () => {
-            expect(event.description).toBe('Markets on the Federal Reserve interest rate decision.');
+        it('derives description from market rules', () => {
+            expect(event.description).toBe('This market resolves YES if the Fed Funds Rate is above 4.75% on Jan 29, 2025.');
         });
 
         it('populates nested markets array', () => {