Update modules.py

modules.py

@@ -21,7 +21,7 @@ def set_etf_data(df_src):
     (df_src['averageVolume'] > 1000) &
     (df_src['exchangeCountry'] == 'United States')
     ].dropna(subset=['categoryName'])
-    full_ticker_list = df['ticker'].unique().tolist()
+    full_ticker_list = df['Ticker'].unique().tolist()
     valid_ticker_set = set(t.upper() for t in full_ticker_list)
     return df, valid_ticker_set