India's BSE Sensex closed about 0.4% firmer at 81,101.3 on Tuesday, advancing for a second day and hitting the highest level in two weeks. Gains were led by the tech sector on Infosys' announcement of a potential share buyback and expectations of US interest rate cuts as soon as this month, reflecting the importance of the US market to the sector. Meanwhile, traders awaited the release of domestic consumer price data for August later this week, which is expected to guide the RBI’s upcoming policy decision amid ongoing US tariff pressures. Among individual stocks, Infosys surged over 5% after announcing a board meet to consider a share buyback, while Adani Ports, Tech Mahindra, HCL Tech, TCS and Bajaj Finserv also advanced firmly. On the flip side, Trent, Eternal, UltraTech Cement and NTPC were among the biggest laggards.