2 outlets▼ Negative
CAS chaos: Nifty’s indicative price drops 2% in 2 seconds, later recovers on monthly F&O expiry day
Indian markets moved lower.
29 Sept 2026 · ET Stocks, Economic Times Markets
Nifty's indicative price sharply dropped by 2% during the closing auction session on monthly expiry day. The index fell from 22,684 to 22,249 within two seconds at 3:20:01. This sudden decline was followed by a rapid recovery, and it closed above the pre-CAS level. Typically, monthly expiry days bring heightened market volatility, contributing to such fluctuations.
The analysis
Because the driver here is macro rather than company-specific, the read-through is to index-level positioning rather than to any single name — correlations tend to rise when the whole market faces the same signal.
Market context
- This is a market-wide development — its reach goes beyond any single stock.
- The immediate tone of coverage reads negative.