Tougher rules on intraday positions to hit F&O traders from tomorrow. How will it impact you?

Capital markets regulator Sebi has earlier rolled out a tighter framework for intraday trading in index derivatives, which will take effect from October 1. The move, aimed at curbing outsized positions that pose risks to market stability, will alter how traders—in the high-stakes world of futures and options—operate on expiry days.

What has changed?

Until now, while end-of-day position limits for index options were clearly defined, intraday exposure was loosely monitored. This allowed certain entities to build speculative positions, especially during the final hours of contract expiry, creating volatility and concerns around market integrity.

Sebi’s new rules introduce strict intraday checks. Starting October 1, every entity will face an intraday net position cap of Rs 5,000 crore (on a futures-equivalent basis), compared with the earlier end-of-day limit of Rs 1,500 crore.

Further, a gross position cap of Rs 10,000 crore on both long and short sides—aligned with existing end-of-day thresholds.

Stock exchanges will now conduct at least four random position checks during the trading day, including one snapshot in the final 45 minutes, when trading activity peaks. Breaches will be scrutinised, and traders may be asked to justify their positions.Expiry day clampdownThe changes are especially critical for expiry sessions, where wild swings are seen. Sebi has made it clear that breaches on expiry days will attract penalties or additional surveillance deposits, beginning December 6, once the transition period for position limits ends. This step is intended to discourage reckless position-building that distorts prices and increases systemic risk.

The regulator noted several instances of entities creating outsized intraday bets in index options, exposing the system to potential instability. By setting well-defined caps, Sebi aims to strike a balance between allowing market makers to provide liquidity and ensuring speculative excesses don’t derail fair price discovery.

Impact on traders and investors

For professional traders, proprietary desks, and institutions, these rules will force tighter risk management. Large players can no longer stretch intraday exposures unchecked, especially during expiry-day strategies like “option writing” or volatility plays.

Retail investors, on the other hand, may not feel the immediate heat, but reduced speculative froth could mean less extreme price moves near expiry. In the long term, this is expected to promote more orderly trading and investor confidence in the derivatives market.

India’s derivatives market is among the most active globally, with volumes in index options often dwarfing those in cash equities. While Sebi has encouraged broader participation through reforms like smaller lot sizes and margin adjustments, it has also been wary of excessive speculation. The latest framework is another step in tightening oversight while preserving liquidity.

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