Nifty spikes 500+ points in CAS chaos, closes above pre-auction levels

Nifty's indicative price surged over 500 points (~2%) within seconds of the Closing Auction Session (CAS) opening on Wednesday, briefly trading near 23,240 before paring gains to close at 22,811 — higher than its pre-CAS level of ~22,738. Sensex mirrored the volatility, jumping near 73,872 before settling at 73,710 (+200 points vs pre-CAS), despite ending the day in the red after a Rs 8 lakh crore selloff across BSE-listed stocks.

Investors were spooked by soaring crude prices, persistent foreign institutional selling, and profit-booking in autos, financials, and realty. Analysts like Vinod Nair (Geojit) noted that elevated oil costs and FII outflows overshadowed optimism around India-US trade talks, while Vatsal Bhuva (LKP Securities) flagged Nifty's 22,650–22,700 support zone as critical, with resistance at 23,000.

Under NSE's CAS rules, the reference price is set between 3:15–3:20 pm, with order matching concluding by 3:35 pm. The near-1% intraday drop for both indices underscored caution, as breadth and foreign flows remained weak despite resilient Q2 earnings.

Nifty indicative jump at CAS open

500+ pts (~2%) Nifty's indicative price jumped over 500 points within seconds of the CAS session opening, trading near 23,240 vs a pre-CAS level of ~22,738.The Economic Times

Sensex CAS close vs pre-CAS

+200 pts Sensex closed at 73,710 — 200 points higher than the pre-CAS level of 73,509, after its indicative price spiked near 73,872.The Economic Times

CAS reference price and matching window

3:15-3:35 pm Under NSE's CAS rules, the reference price is calculated between 3:15 and 3:20 pm and order matching runs from 3:30 to 3:35 pm.NSE India