How will the new Closing Auction Session (CAS) affect stock trading?

How will the new Closing Auction Session (CAS) affect stock trading? 

None

Normal trading ends at 3:15 PM, CAS runs until 3:35 PM, and the post-close session is 3:50 PM–4:00 PM.  

Important: CAS will initially apply only to cash-market stocks for which derivative contracts are available. Other stocks will continue with the existing last-30-minute VWAP method.  


Understand CAS Trading Timings → Know the complete CAS timeline, including normal trading, auction periods, order restrictions, closing price determination, and the post-close session. 


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