The Sensex and Nifty opened the session marginally higher amid firm Asian cues.

At 9.25 a.m., the 30-share BSE index Sensex was up 137.35 points or 0.43 at 31,729.38 and the 50-share NSE index Nifty ws up 45.8 points or 0.46 per cent at 9,934.50.

All BSE sectoral indices were trading in the positive zone. Among them, metal index gained the most by 1.13 per cent, infrastructure 1.06 per cent, oil & gas 1.00 per cent and consumer durables 0.95 per cent.

Top five Sensex gainers were ONGC (+1.73%), Tata Steel (+1.33%), Adani Ports (+1.27%), NTPC (+1.2%) and Sun Pharma (+0.78%), while the only two losers were Tata Motors (-0.77%) and TCS (-0.01%).

Asian stocks were up after optimism over US tax reform plans lifted Wall Street shares to new highs, while the dollar hovered near a seven-week peak following additional indications of solid economic growth.

MSCI’s broadest index of Asia–Pacific shares outside Japan edged up 0.1 per cent, poised for a 1.4 per cent gain on the week.