Stock markets trade mixed amid introduction of new closing auction session

Stock market benchmark indices Sensex and Nifty traded on a mixed note in early trade on Tuesday (August 4, 2026) following the introduction of a new auction mechanism for shares having futures and options (F&O) contracts. The Closing Auction Session (CAS) in the equity cash segment became operational on Monday (August 3, 2026), introducing a new auction-based mechanism for determining the closing prices of eligible stocks in a move aimed at making the price discovery process more transparent and robust. The 30-share BSE Sensex climbed 97 points to 78,736.20 in early trade. The 50-share NSE Nifty declined 173.95 points to…