diff --git a/tradingagents/graph/portfolio_analysis.py b/tradingagents/graph/portfolio_analysis.py
index 52da027f..356c961d 100644
--- a/tradingagents/graph/portfolio_analysis.py
+++ b/tradingagents/graph/portfolio_analysis.py
@@ -176,6 +176,6 @@ class PortfolioAnalyzer:
             "portfolio_summary": portfolio_summary,
         }
 
-        log_file = directory / f"portfolio_analysis_{trade_date}.json"
+        log_file = directory / f"portfolio_analysis_{Path(str(trade_date)).name}.json"
         with log_file.open("w", encoding="utf-8") as f:
             json.dump(log_data, f, indent=4)