F&O expiry: Nifty sees CAS-led wild swings, briefly falls up to 2.2%; Bank Nifty declines 1,100 points

Executive Brief • Key Highlights
Fast factual intelligence distilled for busy investors, executives, and answer bots:
- ✓The Nifty index briefly fell 2.2% during the closing auction session on September 29 due to monthly derivatives expiry.
- ✓Bank Nifty slid 1,100 points during the same period.
- ✓Many users shared screenshots of these wild swings.
Story at a Glance
- Category
- BUSINESS
- Reported By
- Moneycontrol.com
- Reading Speed
- 5 Minute(s)
- Market Focus
- India Economy
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The indicative closing level of the 50-stock Nifty index briefly slumped 2.2% during the closing auction session on September 29, amid volatility due to monthly expiry of derivatives contracts. Nifty hit a low of 22,267 while Bank Nifty slid below 53,300 during CAS.
The Nifty's indicative price fell over 2% on the monthly F&O expiry, then swiftly bounced back, sparking brief market turbulence.
The Nifty 50 lost 0.28% to 22,716.2 and BSE Sensex fell 0.33% to 72,529.07 on September 29. Bank Nifty declined 0.4% to 54,259.95.
Some X users shared screenshots of the massive fall that happened for a few minutes.
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