diff --git a/jaqs/data/dataservice.py b/jaqs/data/dataservice.py
index dcf37bf..026b24e 100644
--- a/jaqs/data/dataservice.py
+++ b/jaqs/data/dataservice.py
@@ -845,7 +845,7 @@ def str2int(s):
         for sec, df in gp:
             mask = np.zeros_like(dates, dtype=np.integer)
             for idx, row in df.iterrows():
-                bool_index = np.logical_and(dates > row['in_date'], dates < row['out_date'])
+                bool_index = np.logical_and(dates >= row['in_date'], dates <= row['out_date'])
                 mask[bool_index] = 1
             dic[sec] = mask