Update app.py

app.py

@@ -7,7 +7,7 @@ import gradio as gr
 def plot_volatility_bands(ticker, reference_year):
     
     # Retrieving historical data and performing some preprocessing
-    df = yf.download(ticker, , multi_level_index=False, auto_adjust=False)
+    df = yf.download(ticker, multi_level_index=False, auto_adjust=False)
     df['Returns'] = df['Adj Close'].pct_change(1)
     df['Adj Low'] = df['Low'] - (df['Close'] - df['Adj Close'])
     df['Adj High'] = df['High'] - (df['Close'] - df['Adj Close'])