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SEBI Rules Favor Large Investors Over Small Ones

SEBI's new rules are causing concerns among small investors. Changes to the Closing Auction Session and block deal framework are being questioned.

Mumbai Alert · Markets Desk
Mumbai Alert · Markets Desk
Markets Desk · Mumbai Alert News · Wed, 09 September 2026 at 09:23 pm
SEBI Rules Favor Large Investors Over Small Ones

India's capital markets were designed to be open and fair to all investors, regardless of their size. However, recent changes to the rules by the Securities and Exchange Board of India (SEBI) have raised concerns that the regulator is favoring large investors over small ones.

The introduction of the Closing Auction Session (CAS) on August 3 has been a major flashpoint. The CAS replaced the traditional method of determining the closing price, which was based on the volume-weighted average of the final half hour of continuous trading. The new system uses a dedicated 20-minute auction after continuous trading stops at 3:15 pm for stocks that have derivatives.

SEBI presented the change as a modernization effort, aimed at improving price discovery and aligning with global exchanges. However, the results have been disappointing. In the first month of the CAS, equity derivatives turnover on the National Stock Exchange (NSE) collapsed to its lowest level since November 2023. Bank Nifty futures volumes also fell steeply, and equity options contracts dropped roughly 30% month on month.

The CAS has created uncertainty and volatility in the market, making it difficult for small traders to participate. On September 3, the indicative closing level of the Sensex derivatives expiry swung wildly, with some put option premiums exploding 400 to 500% in minutes. This has led to a situation where small traders are being forced to close positions early, cut expiry exposure, and buy more hedges.

SEBI's response to the situation has been to announce a review of the derivatives settlement methodology. While the review is necessary, it is unclear why the CAS is being continued unchanged while the review proceeds. This has left retail participants carrying the consequences of an experiment they did not ask for.

The problem does not end with the CAS. SEBI's recent rewrite of the block deal framework has also raised concerns. The price band has been widened from 1% to 3%, and the minimum deal size has jumped from Rs 10 crore to Rs 25 crore. While large investors need room to move size without excessive market impact, the wider window makes it easier for them to do so at the expense of small investors.

The changes to the rules have created a situation where small investors are being left behind. The regulator's primary responsibility is to protect the interests of all investors, not just the largest ones. It is time for SEBI to re-examine its rules and ensure that they are fair and equitable for all participants in the market.

The capital markets are a critical component of India's economy, and it is essential that they are regulated in a way that promotes fairness, transparency, and openness. The current situation, where small investors are being disadvantaged, is not sustainable and needs to be addressed urgently.

In conclusion, SEBI's recent changes to the rules have raised concerns among small investors. The regulator needs to re-examine its rules and ensure that they are fair and equitable for all participants in the market. The capital markets are a critical component of India's economy, and it is essential that they are regulated in a way that promotes fairness, transparency, and openness.

The changes to the CAS and block deal framework have created uncertainty and volatility in the market, making it difficult for small traders to participate. It is time for SEBI to take a step back and re-evaluate its rules to ensure that they are promoting the interests of all investors, not just the largest ones.

The regulator's primary responsibility is to protect the interests of all investors, and it is essential that it takes a more nuanced approach to regulation. The current situation, where small investors are being disadvantaged, is not sustainable and needs to be addressed urgently.

In the end, the regulator's goal should be to create a fair and equitable market that allows all participants to thrive. This can only be achieved by ensuring that the rules are fair, transparent, and open to all investors, regardless of their size.

The Indian capital markets have a long history of promoting fairness and transparency, and it is essential that this tradition continues. The regulator's recent changes to the rules have raised concerns, and it is time for SEBI to take a step back and re-evaluate its approach to regulation.

The capital markets are a critical component of India's economy, and it is essential that they are regulated in a way that promotes fairness, transparency, and openness. The regulator's primary responsibility is to protect the interests of all investors, and it is essential that it takes a more nuanced approach to regulation.

In conclusion, the regulator's goal should be to create a fair and equitable market that allows all participants to thrive. This can only be achieved by ensuring that the rules are fair, transparent, and open to all investors, regardless of their size. The current situation, where small investors are being disadvantaged, is not sustainable and needs to be addressed urgently.

Frequently asked questions

What is the Closing Auction Session (CAS) and how does it affect small investors?

The CAS is a new system introduced by SEBI that determines the closing price of stocks. It has created uncertainty and volatility in the market, making it difficult for small traders to participate.

How has SEBI's rewrite of the block deal framework affected small investors?

The changes to the block deal framework have widened the price band and increased the minimum deal size, making it easier for large investors to move size without excessive market impact, but disadvantageous for small investors.

sebicasblock deal frameworksmall investorslarge investors
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