Update app.py

app.py

@@ -23,7 +23,13 @@ except Exception as e:
     all_data = {ticker: pd.DataFrame() for ticker in tickers}  # Initialize empty DataFrames on failure
 
 # Create a DataFrame with 'Adj Close' columns for each ticker using pd.concat to handle varying lengths
-adj_close_data = pd.concat([data['Close'].rename(ticker) for ticker, data in all_data.items() if not data.empty], axis=1)
+series_list = []
+for ticker, data in all_data.items():
+    if not data.empty:
+        s = data['Close']
+        s.name = ticker
+        series_list.append(s)
+adj_close_data = pd.concat(series_list, axis=1)
 
 # Display the first few rows to verify (for debugging; remove in production)
 print(adj_close_data.head())