India's BSE Sensex closed about 0.4% firmer at 81,635.9 on Monday, staging a recovery after last session’s dip, on the back of strong buying in IT majors and continued strength among heavyweights across other sectors. Global sentiment improved after Federal Reserve Chair Jerome Powell signaled openness to rate cuts during the Jackson Hole summit in Wyoming on Friday. On the domestic front, optimism around the proposed GST rationalisation - expected to stimulate consumption - provided support. However, concerns persist as the U.S. prepares to implement an additional 25% tariff on Indian goods from August 27, raising total duties to 50%. Among the top gainers, Infosys, TCS and HCL Technologies all rose around 3%.