NSE New Lot Sizes for Nifty, Bank, Financial Services & Midcap Indices; How It Will Impact Investors & Trading

The National Stock Exchange (NSE) has announced a revision in market lot sizes for several of its flagship index derivatives, effective after the December 2025 expiry cycle. The move is aimed at keeping contract values within the Rs 10-15 lakh range, a threshold set by market regulators for index derivatives, and is expected to make trading more accessible, particularly for retail participants.

NSE New Lot Sizes: Check Revised Lot Sizes

Under the new framework, the market lot sizes for select indices will be reduced as follows:

Nifty 50: from 75 units per lot to 65

Nifty Bank: from 35 units per lot to 30

Nifty Financial Services: from 65 units per lot to 60

Nifty Midcap Select: from 140 units per lot to 120

Nifty Next 50: lot size remains unchanged

Transition Timeline for Weekly, Monthly and Quarterly Contracts

The NSE circular clarified that existing weekly and monthly contracts will continue with current lot sizes until their respective December 2025 expiries.

The last weekly contracts under the current framework will expire on December 23, 2025

The final monthly contracts will expire on December 30, 2025

New weekly contracts with revised lot sizes will begin from the January 6, 2026 expiry

New monthly contracts with revised lot sizes will start from the January 27, 2026 expiry

Quarterly and half-yearly index derivatives will also adopt the new lot sizes at the end of trading on December 30, 2025. The March 2026 contract, originally introduced as a quarterly expiry, will be treated as a far-month contract under the revised framework, aligning with the broader rollover schedule.

How NSE Impact on Traders

The reduction in market lot sizes is expected to lower upfront margin requirements, making index futures and options more accessible to retail traders. While smaller contract sizes reduce the capital needed to take positions, the overall risk profile for traders remains unchanged.

Market participants have historically noted that NSE index derivatives lot size changes, which typically occur every six months, can create operational challenges. The exchange has emphasized that the current transition schedule is structured to ensure an orderly rollover, allowing traders to smoothly move positions into the updated contracts.

Disclaimer

The views and recommendations expressed are solely those of the individual analysts or entities and do not reflect the views of Goodreturns.in or Greynium Information Technologies Private Limited (together referred as "we"). We do not guarantee, endorse or take responsibility for the accuracy, completeness or reliability of any content, nor do we provide any investment advice or solicit the purchase or sale of securities. All information is provided for informational and educational purposes only and should be independently verified from licensed financial advisors before making any investment decisions.