diff --git a/tests/test_memory_log.py b/tests/test_memory_log.py
index 28a943498..d05fc3c5a 100644
--- a/tests/test_memory_log.py
+++ b/tests/test_memory_log.py
@@ -136,6 +136,23 @@ class TestTradingMemoryLogCore:
         log.store_decision("NVDA", "2026-01-10", DECISION_BUY)
         assert len(log.load_entries()) == 1
 
+    def test_store_decision_idempotent_after_the_entry_resolves(self, tmp_path):
+        """A settled entry still blocks a duplicate.
+
+        The guard matched only pending entries, so re-running a ticker and date
+        whose outcome had already been settled appended a second entry: the same
+        decision counted twice in past context and in any aggregate over the log.
+        """
+        log = make_log(tmp_path)
+        log.store_decision("NVDA", "2026-01-10", DECISION_BUY)
+        log.update_with_outcome("NVDA", "2026-01-10", 0.05, 0.02, 5, "worked", "2026-01-17")
+
+        log.store_decision("NVDA", "2026-01-10", DECISION_BUY)
+
+        entries = log.load_entries()
+        assert len(entries) == 1
+        assert entries[0]["pending"] is False  # the settled record is kept, not replaced
+
     def test_batch_update_resolves_multiple_entries(self, tmp_path):
         """batch_update_with_outcomes resolves multiple pending entries in one write."""
         log = make_log(tmp_path)
diff --git a/tradingagents/agents/utils/memory.py b/tradingagents/agents/utils/memory.py
index 30b16339b..6abb5f631 100644
--- a/tradingagents/agents/utils/memory.py
+++ b/tradingagents/agents/utils/memory.py
@@ -36,11 +36,14 @@ class TradingMemoryLog:
         """Append pending entry at end of propagate(). No LLM call."""
         if not self._log_path:
             return
-        # Idempotency guard: fast raw-text scan instead of full parse
+        # Idempotency guard: fast raw-text scan instead of full parse. Any entry
+        # for this ticker and date blocks another, pending or settled: a re-run
+        # after the outcome landed would otherwise count the same decision twice
+        # in past context and in every aggregate over the log.
         if self._log_path.exists():
             raw = self._log_path.read_text(encoding="utf-8")
             for line in raw.splitlines():
-                if line.startswith(f"[{trade_date} | {ticker} |") and line.endswith("| pending]"):
+                if line.startswith(f"[{trade_date} | {ticker} |") and line.endswith("]"):
                     return
         rating = parse_rating(final_trade_decision)
         tag = f"[{trade_date} | {ticker} | {rating} | pending]"