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edgar_client.py

@@ -401,13 +401,13 @@ class EdgarDataClient:
             # Determine target form types to search
             if 'Q' in period:
                 # Quarterly data, mainly search 10-Q (20-F usually doesn't have quarterly reports)
-                target_forms = ["10-Q"]
-                target_forms_annual = ["10-K", "20-F"]  # for fallback
+                target_forms = ("10-Q",)  # Use tuple for caching
+                target_forms_annual = ("10-K", "20-F")  # for fallback
                 year = int(period.split('Q')[0])
                 quarter = period.split('Q')[1]
             else:
                 # Annual data, search 10-K and 20-F annual forms
-                target_forms = ["10-K", "20-F"]
+                target_forms = ("10-K", "20-F")  # Use tuple for caching
                 target_forms_annual = target_forms
                 year = int(period)
                 quarter = None