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New SEBI guidelines for Derivative Index Expiry.

Here's a summary of the revised market lot sizes for derivative contracts on indices as per the NSE circular dated October 3, 2025:

- Nifty 50: Revised from 75 to 65
- Nifty Bank: Revised from 35 to 30
- Nifty Financial Services: Revised from 65 to 60
- Nifty Mid Select: Revised from 140 to 120
- Nifty Next 50: Lot size remains unchanged at 25

These changes are effective from October 28, 2025.

New SEBI guidelines for Derivative Index Expiry.