New SEBI Rule for Stock Market: NSE Eases OTR Norms for Options Trading

In a move aimed at improving trading efficiency, the National Stock Exchange of India (NSE) has revised the order-to-trade ratio (OTR) framework for the equity derivatives options segment. The updated rules, effective April 6, 2026, align with earlier guidelines issued by Securities and Exchange Board of India (SEBI) and are expected to primarily impact high-frequency and algorithmic traders.

The change reflects a broader regulatory effort to balance market liquidity with surveillance of excessive order activity.

What Has Changed in the OTR Framework?

The most significant update lies in the widening of the exemption band for OTR calculations in the options segment.

Under the revised framework, orders within ±40% of the last traded price (LTP) of the options premium or ±₹20 (whichever is higher) will now be excluded from OTR computation for penalty purposes. 

This marks a sharp shift from the earlier rule, where only orders within 0.75% of LTP were exempt, which used to be a much narrower band.

The revised norms provide greater flexibility, especially for traders placing multiple orders across a wider price range, reducing the likelihood of penalties due to high order activity.

Who Benefits from the New Rules?

The updated framework is particularly relevant for algorithmic and high-frequency traders, whose strategies involve frequent order placements, modifications, and cancellations.

Additionally, as per SEBI’s February circular, market-making algorithmic orders placed by designated market makers are now excluded from OTR calculations altogether. 

This targeted relaxation is expected to improve market liquidity, encourage efficient price discovery, and reduce operational friction for institutional participants. 

However, the OTR framework remains unchanged for the equity derivatives futures segment, and the Cash segment. In these segments, the earlier 0.75% LTP-based exemption continues to apply.

Why This Matters for the Market

The OTR metric tracks the ratio of total orders (including cancellations and modifications) to executed trades, serving as a key surveillance tool for exchanges.

By widening the exemption band, regulators aim to distinguish between genuine trading activity and excessive, potentially disruptive order flows. The revision follows industry feedback, consultations with market participants, and recommendations from SEBI’s Secondary Market Advisory Committee (SMAC).

NSE had also conducted mock trading sessions in March to ensure a smooth rollout of the new system.

Read more: GIFT City Insurance Premiums Hit $1.2 Billion, Surges 11x in 5 Years.

Conclusion

The revised OTR framework signals a calibrated regulatory approach—easing restrictions where necessary while maintaining oversight. For high-frequency and algorithmic traders, the changes offer greater operational flexibility, while for the broader market, they could enhance liquidity and trading efficiency.

As markets evolve with technology, such adjustments highlight SEBI’s ongoing effort to keep regulation aligned with modern trading dynamics.

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