Bombay Stock Exchange ( BSE ) is exploring steps to extend the tenure of its options segment, including a potential shift from weekly to monthly expiries for index contracts. If implemented, the move could have a significant impact on derivatives volumes across exchanges.

The regulatory change introduced in November 2024—allowing only one weekly expiry per exchange—had triggered a sharp migration of volumes from Bank Nifty to Sensex, pushing BSE’s premium turnover market share from 11.4% in October 2024 to 24.4% in September 2025. In addition, a large base of foreign portfolio investors ( FPI ) is still in the process of completing system setups after rack allocation.

This is expected to further accelerate trading activity and strengthen volumes in the coming months. The shift of exp

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