Changes in Lot Size

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.