From 7ccf3f765851fecba7c410393704e7b4d7057b4e Mon Sep 17 00:00:00 2001
From: Srujan Rana <125748305+Srujanrana07@users.noreply.github.com>
Date: Tue, 21 Apr 2026 11:23:18 +0530
Subject: [PATCH] fix: incorrect index implementation in FileCalendarStorage
 (#2195)

---
 qlib/data/storage/file_storage.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qlib/data/storage/file_storage.py b/qlib/data/storage/file_storage.py
index 8a100a2d1..e2bc5c367 100644
--- a/qlib/data/storage/file_storage.py
+++ b/qlib/data/storage/file_storage.py
@@ -156,7 +156,7 @@ class FileCalendarStorage(FileStorageMixin, CalendarStorage):
     def index(self, value: CalVT) -> int:
         self.check()
         calendar = self._read_calendar()
-        return int(np.argwhere(calendar == value)[0])
+        return calendar.index(value)
 
     def insert(self, index: int, value: CalVT):
         calendar = self._read_calendar()