diff --git a/sample/sample_ticker_rich.py b/sample/sample_ticker_rich.py
index 90e53a1..9b79a22 100644
--- a/sample/sample_ticker_rich.py
+++ b/sample/sample_ticker_rich.py
@@ -60,7 +60,7 @@ def generate_table(tickers) -> Table:
                 f"{ticker.day_percent_change_mid:.2f}",
                 f"{ticker.day_high:.2f}",
                 f"{ticker.day_low:.2f}",
-                f"{ticker.timestamp.strftime('%Y-%m-%d %H:%M:%S')}",
+                f"{ticker.timestamp.strftime('%Y-%m-%d %H:%M:%S') if ticker.timestamp else ''}",
             )
 
         return table