Indian stock markets opened strong on Friday with Sensex up 200 points at 81,758.95 and Nifty gaining 60 points to 25,074.45. Infosys, TCS, Axis Bank, HCL Tech and Tata Motors led gains. Experts said US tariff relief and GST 2.0 reforms could be major catalysts, while strong domestic macros continue to support market optimism.