Buy or sell stocks, Sept. 11 -- The key benchmark indices of the Indian stock market opened with a strong gap-up and maintained a positive bias throughout the session, supported by renewed optimism over ongoing negotiations in the India-US trade deal. Improved global cues and sustained buying in select heavyweights also boosted sentiment. At the close, the Sensex climbed 323.83 points (0.40%) to settle at 81,425.15, while the Nifty advanced 104.50 points (0.42%) to finish at 24,973.10.

On the sectoral front, Nifty IT, PSU Banks, and Realty outperformed with robust gains of 1-3%, reflecting renewed buying interest. Other sectors too contributed marginally, though Nifty Auto and Media ended as laggards. Broader markets mirrored the upbeat ...