CAS U-turn ahead? BSE, Groww, NSE, other capital market stocks jump up to 4% amid buzz around Sebi tweaking F&O settlement rules

Capital market shares advanced in Indian trading on Tuesday, October 6, 2026, after a Reuters report indicated that SEBI may soften parts of its new Closing Auction Session framework for derivatives settlement. BSE, NSE, Groww and Angel One were among the names in focus, with gains reaching 4%. The move coincided with a recovery in options volumes and reduced concern about the settlement changes. However, the available information describes possible regulatory changes rather than a formal decision, and gives no detail on which provisions could be revised or when any revision might take effect.

The immediate read through is strongest for exchanges and brokerages, because derivatives settlement rules may influence trading activity, options volumes and the revenue linked to those transactions. BSE and NSE have direct exposure as market infrastructure operators, while Groww and Angel One may be affected through client participation in derivatives. A partial rollback could therefore ease fears that the Closing Auction Session would disrupt activity, helping sentiment across capital market stocks. That interpretation would be confirmed by a formal SEBI communication, clear amendments and sustained options volumes. It would weaken if the regulator retains the rules largely unchanged or if the recent volume recovery fades.