From the clipping
“Small investors or traders are looking to hit jackpot during the 10-minute CAS window which witnesses wild swings in Nifty and Sensex weekly option prices on expiry day.”
On the CAS window and weekly options
Cash continuous trading ends at 3:15 pm; a 10-minute Closing Auction Session runs for index constituents while derivatives continue until 3:40 pm. That gap — a short cash auction over a still-open options book — is where retail participation has risen in the new regime, with expiry-day weekly options seeing sharp moves in the CAS window.
The excerpt above is from Shai Coelho's remarks as published in Mint. The print clipping is shown as it appeared; the full piece is at Livemint. Market commentary is educational and observational; it is not investment advice or a trading recommendation.