Indian stock markets opened higher on the last trading day of 2025, with the Sensex and Nifty both seeing gains. Metal stocks rallied following the government's imposition of an 11-12% import tariff on select steel products for three years, primarily to curb shipments from China. Analysts note potential for market upside, though FII selling and a lack of new triggers are headwinds. Key upcoming events include December auto sales, Q3 corporate results, budget expectations, and global economic news.