NSE Revises OTR Rules for Options Trading; 40% Range Rule to Reduce Penalty Risk for Traders; Know Impacts

The National Stock Exchange of India (NSE) has implemented a revised order-to-trade ratio (OTR) framework for equity derivatives options, effective April 6, 2026, in line with earlier guidelines issued by Securities and Exchange Board of India. The move is aimed at refining how excessive order activity-especially from high-frequency and algorithmic traders-is monitored and regulated.

NSE Implements New OTR Rules: What It Means for Traders

Under the revised framework, NSE has expanded the range of orders that will be excluded from OTR calculations in the options segment.

Orders placed within a band of up to 40% above or below the last traded price (LTP) of the options premium, or Rs 20 above or below, whichever is higher, will now be excluded when calculating OTR for penalty purposes.

This is a major shift from the earlier rule, where only orders within a narrow 0.75% range of the LTP were exempt. The wider band provides significantly more flexibility to traders, especially those dealing in volatile options contracts.

What is OTR and Why It Matters

The order-to-trade ratio (OTR) is a key metric used by exchanges to track trading behaviour. It measures the number of orders placed (including modifications and cancellations) against the number of actual trades executed.

A high OTR typically indicates excessive order placements without execution, which can strain exchange systems and impact market efficiency. Regulators use this metric to discourage unnecessary order flooding and ensure fair market practices.

No Change in Futures and Cash Segments

While the options segment has seen a relaxation, the rules for other segments remain unchanged.

In equity derivatives futures and the cash market, the earlier threshold continues to apply. Orders within 0.75% of the LTP will still be excluded from OTR calculations, maintaining the existing discipline in these segments.

The updated rules also introduce clarity for algorithmic trading participants involved in market-making activities.

As per SEBI's earlier circular, algorithmic orders placed by designated market makers will not be counted towards OTR. This exemption is intended to support liquidity providers who continuously place buy and sell orders to maintain smooth market functioning.

New OTR Rules: Why the Rule Was Revised

The changes come after discussions between stock exchanges, market participants, and recommendations from SEBI's Secondary Market Advisory Committee (SMAC).

Market participants had raised concerns that the earlier narrow exemption band penalised legitimate trading strategies, particularly in options where price movements can be sharp and frequent. The revised framework aims to strike a balance between controlling excessive order activity and allowing genuine trading flexibility.

NSE Updates OTR Rules for Derivatives: Impact on Traders

For high-frequency and algorithmic traders, the new rules are likely to reduce the risk of penalties linked to high OTR. The broader exemption band allows for more dynamic order placement without breaching limits.

At the same time, the framework continues to discourage unnecessary order cancellations and modifications outside the defined range. For retail investors, the changes may lead to improved market depth and smoother price discovery, especially in the options segment.