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By Bajaj Broking Team
NSE Clearing Limited has introduced an additional exposure margin on select F&O securities based on MWPL concentration criteria. Understand how the revised framework works, when it applies, and how it may affect margin requirements, open positions, and derivatives trading activity.
The NSE Clearing Limited via its circular has announced an extra exposure margin for a handful of securities in the equity derivatives segment, and it becomes effective from May 29, 2026. This change is tied to their risk management setup where the concentration, under Market Wide Position Limit (MWPL) , is high
For equity derivatives securities, an additional exposure margin of 15% will be charged if the top 10 clients together account for more than 20% of the MWPL.
Every three months, this will be assessed with rolling data, and will be checked thereafter every month.
MWPL means Market Wide Position Limit. In simple terms, it’s the maximum open position allowed for a stock’s derivatives across the overall market. It’s used to watch and control risk when you’re dealing in futures and options trading.
And when open positions in a stock’s derivatives start getting concentrated among a limited number of clients, the market risk can rise. So NSE Clearing is adding an extra margin for certain securities, as a control lever.
This may impact traders who already hold, or are planning to take positions in the affected F&O names. Since margins for derivatives are collected upfront , the required capital may go up for some trades.
A higher margin demand for those particular securities
Potential need to keep extra funds ready in the trading account
Effects on both new trades and existing F&O positions in the shortlisted securities
Traders should confirm whether their chosen securities are actually part of the applicable list before placing orders.
Assume a trader wants to take an F&O position in a security that is shortlisted.
Earlier, the trader only had to maintain the usual margin needed for that contract. But after the new framework activates, an additional exposure margin of 15% also gets considered.
Now assume the same security already has an existing surveillance margin. Then the higher applicable margin is charged, not both added together.
If the additional exposure margin is 15%, and the surveillance margin is 10% , then 15% will apply
If the additional exposure margin is 15%, and the surveillance margin is 20% , then 20% will apply
So, it’s not like margins are charged simultaneously. They only charge whichever is higher.
This setup gets reviewed every month. The list is generated based on three months of rolling data.
That means some securities can get added, and others might drop off, depending on whether they still satisfy the stated criterion. Traders should keep checking official updates and the current applicable security list.
Additional exposure margin is 15%
Only on select equity derivatives securities
Trigger is top 10 clients who have more than 20% of MWPL
Effective from May 29, 2026
Higher margin is charged if the surveillance margin already applies
Monthly review
Overall, this additional exposure margin framework is a major update for anyone trading in futures and options. It targets those specific securities where client-level concentration moves past the MWPL threshold.
So it’s a safe practice to review open positions, check the applicable securities list, and make sure the required margin is available before placing trades. Staying alert to these kinds of changes can help prevent margin shortfalls and avoid potential trading disruptions
Source: NSE
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Content Partner - Dalal Street Investment Journal Wealth Advisory Private Limited
This article is for educational purposes only and should not be considered investment advice. Market investments are subject to risks. DSIJ Wealth Advisory Private Limited is a SEBI-registered Research Analyst (Reg. No: INH000006396) and Investment Adviser (Reg. No: INA000001142). Please consult your financial adviser before investing.
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