Stock to buy after SEBI CAS new rule: Following the Indian capital market regulator SEBI’s action on the Closing Auction Session (CAS), to restore the final 30-minute continuous-session VWAP for derivatives settlement, brokerage stock Groww witnessed strong buying during the Friday session. Shares of Groww brand parent Billionbrains Garage Ventures Ltd finished around 1.50% higher on Friday, extending its uptrend for the second straight session.
According to market experts, Billionbrains Garage Ventures shares are expected to benefit from SEBI's CAS new rule. Experts believe a change in the methodology for computing the settlement price of index derivatives may reduce volatility on the expiry date, which is highly visible under CAS. Global Investment Bank Jefferies picked Goww to outperform its peers, while some Indian experts cited three major reasons to buy this brokerage stock.
Speaking on the SEBI's CAS move, Jefferies India report said, “SEBI has changed the methodology to compute the settlement price of index derivatives on expiry day, as proposed in the Sep'26 consultation paper, to the volume-weighted average price (VWAP), effective 7th Dec'26. This should reduce expiry-day volatility under the Closing Auction Session (CAS), benefiting brokers whose orders remain below pre-CAS levels. With premium turnover for exchanges back to pre-CAS levels, earnings upside may be limited. BUY Groww.”
Speaking on the three major benefits, which may attract fresh investors looking to reap the benefits of SEBI's CAS move, SEBI-registered market expert Anuj Gupta, said, “I am expecting three major developments post-SEBI's CAS move: a big jump in derivative trading volume, higher trading volume leading to higher brokerage revenue for brokerage firms, and brokers to benefit more than exchanges.”
On why one should buy Grow parent Billionbrains Garage Ventures shares, Anuj Gupta said, “In Q2 results 2026, Groww reported that around 45% of its income came from the equity derivative segment. This could become possible despite more than 14% QoQ dip in the equity derivative income of the brokerage. The brokerage has claimed that dip in the derivative segment income can be attributed to CAS. So, when SEBI's new rule on CAS gets effective in December 2026, Groww's equity derivative income is expected to shoot up, strengthening its balance sheet.”