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    New Updates In Futures & Options

    When will the new lot sizes for weekly and monthly contracts be effective?

    As per the recent NSE circular dated October 2025, the current lot sizes will remain in effect for all weekly and monthly index derivative contracts until their expiry on December 30, 2025. From that date onward, the revised lot sizes will apply to quarterly and half-yearly contracts as well.

    Previously, after the implementation of SEBI's new rules (from November 21, 2024) the weekly contracts had the revised lot size(75 for Nifty) from 2 January, 2025 for NIFTY and (20 for SENSEX) from 7 January, 2025.

    What are the new lot sizes for index derivatives? What happens to existing contracts during the transition? Can different lot sizes co-exist in the same month? How do the new lot sizes impact margin requirements? What other changes has SEBI introduced in the F&O segment? What is the rationale behind the changes in Futures and Options new rules mentioned in circular dated November 2024? What are the implementation dates for the new changes? What is revised expiry schedule for NSE contracts? What is revised expiry schedule for BSE contracts? When will the new lot sizes for derivative contracts be effective? What is the change in lot size for long dated and do I need to square off my long-dated positions?