The Closing Auction Session (CAS) on expiry day led to unprecedented volatility in the Nifty 50 and Sensex, causing the indices to swing wildly in just 14 minutes and raising concerns among traders about market manipulation and increased speculation.
The Nifty 50 experienced significant volatility during its closing auction session, leading to losses for both long and short retail options traders due to thin liquidity and rapid price swings, particularly in private-sector banks.