The Bombay Stock Exchange (BSE) on November 19, 2025, issued a circular regarding
change in the BSE Bankex Index Methodology.
The following has been stated: -
•BSE Bankex methodology has been revised effective December 26, 2025, as per SEBI’s circular dated October 30, 2025.
•Minimum index constituents increased from 10 to 14, with the same 2% buffer rules and preference for derivative stocks.
•Weighting methodology changed to a float-adjusted market-cap system with caps: 20% per stock, 45% for top 3, 60% for top 5, and descending weight order.
•Reconstitution from Dec 2025 will follow the new rules, with future reviews semi-annually in June and December.
[Circular No.: 20251119-37]
