diff --git a/strategy_lab.py b/strategy_lab.py
index 23b7154d..bb7f444d 100644
--- a/strategy_lab.py
+++ b/strategy_lab.py
@@ -756,10 +756,6 @@ def _get_external_factors(code, dt):
             result['news3'] = hi - lo
     _EXTERNAL_CACHE[key] = result
     return result
-    except Exception:
-        pass
-    _EXTERNAL_CACHE[key] = result
-    return result
 
 def is_hk_code(code):
     return len(code) == 5 and code.startswith('0')