diff --git a/models/api/finstitutions/trading/symbols/list.py b/models/api/finstitutions/trading/symbols/list.py
index 530b02a..7db6dbb 100644
--- a/models/api/finstitutions/trading/symbols/list.py
+++ b/models/api/finstitutions/trading/symbols/list.py
@@ -182,7 +182,7 @@ class TradingSymbol(BaseModel):
                     datetime.time(hour = 0, minute = 0, second = 0)
                 ),
                 timezone = date_time.TIMEZONE_UTC
-            ),
+            ) if instrument["expiry"] else None,
             expiryTz = "Asia/Kolkata"
         )
 
diff --git a/socketio/__init__.py b/socketio/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/socketio/finstitutions/__init__.py b/socketio/finstitutions/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/socketio/finstitutions/trading/__init__.py b/socketio/finstitutions/trading/__init__.py
new file mode 100644
index 0000000..e69de29