BSE Shares Fall Over 3% as Bernstein Flags Normalisation in Derivatives Growth

BSE shares came under pressure on Wednesday, September 9, falling more than 3% in early trade after Bernstein initiated coverage on the stock with an ‘underperform’ rating. 

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The stock was trading 3.2% lower at ₹3,285, extending the weakness seen in the previous session. On Tuesday, BSE had closed 1.5% lower at ₹3,394. 

The recent decline, however, comes after a strong run earlier in the year. BSE shares are still up 29.2% in 2026, while the exchange has a market capitalisation of more than ₹1.38 lakh crore. 

Why Is Bernstein Cautious on BSE? 

The brokerage’s concern centres on a possible cooling-off in the retail derivatives boom that has supported Indian exchanges in recent years. 

Bernstein expects BSE’s market-share gains to peak in FY27, with growth normalising thereafter. It has set a target price of ₹2,820 for the stock, about 17% below Tuesday’s closing price. 

Retail participation in equity derivatives has played an important role in the earnings and valuation growth of exchanges. That momentum is now showing signs of moderation, raising questions over how quickly businesses with significant exposure to the segment can continue to grow. 

For BSE, this comes at a time when trading volumes are already being watched closely. 

Closing Auction Session Weighs on Options Volumes 

The recently introduced Closing Auction Session (CAS) has added another layer to the discussion around volumes. 

BSE’s management has acknowledged that index options volumes have declined following its introduction, with limited liquidity during the auction session affecting participation. 

SEBI introduced CAS on August 3 as a new mechanism for determining closing prices in the cash market. Since then, the framework has drawn attention because of differences in index closing levels across exchanges, volatility in options pricing and concerns around trading on expiry days. 

SEBI said last week that it would review the methodology used to determine derivatives settlement prices after receiving feedback on the new system. 

The increase in securities transaction tax (STT) and its possible impact on trading activity has also emerged as another concern for exchanges. 

MCX Gets a More Positive View 

Bernstein’s outlook on Multi Commodity Exchange of India (MCX) is notably different. The brokerage initiated coverage on MCX with an ‘outperform’ rating and a target price of ₹3,830. 

That represents an upside of around 15% from MCX’s Tuesday closing price of ₹3,342. 

MCX shares have already gained 52.1% in 2026, taking the exchange’s market capitalisation above ₹85,200 crore. 

For BSE, Wednesday’s fall brings the sustainability of its derivatives-led growth back into focus. The stock has delivered sizeable gains this year, but softer options volumes, the impact of CAS and expectations of moderating derivatives activity are now shaping the near-term conversation around the exchange.