Indian equity markets gained ground to end higher, with the Nifty holding above the 25,400 mark and Sensex scaling the 83,000 levels. India's Chief Economic Advisor (CEA) V Anantha Nageswaran expressed optimism regarding the swift resolution of India-US trade deal discussions. Biocon and Glenmark surged on regulatory approvals, while Poonawalla Fincorp rallied 12% on promoter fund infusion.