NSE overhauls key trading rules: CAS, F&O expiry trading hours revised - What changes from December 7?

What happened: The National Stock Exchange (NSE) announced changes to the Closing Auction Session (CAS) in the equity cash segment and to trading modalities in the equity derivatives segment, effective December 7. Key numbers: CAS duration shortened to 10 minutes. Derivatives trading hours extended to 3:45 pm. Why it matters: The changes follow SEBI's review of the Closing Auction Session, market timings and settlement methodology for derivatives contracts. CAS will not apply to securities with derivative contracts on the ex-date of a scheme of arrangement.

The National Stock Exchange (NSE) announced changes to the Closing Auction Session (CAS) in the equity cash segment and to trading modalities in the equity derivatives segment, effective December 7.

The changes follow SEBI's review of the Closing Auction Session, market timings and settlement methodology for derivatives contracts. CAS will not apply to securities with derivative contracts on the ex-date of a scheme of arrangement.