The benchmark BSE Sensex gained nearly 142 points in early trade on Tuesday, extending its Monday's rally, driven by revived investor confidence on improved chances of Hillary Clinton's victory in the US poll.


Moreover, increased buying by foreign funds and domestic financial institutions also supported trading sentiment.


The 30-share index surged 141.72 points, or 0.51 percent  to 27,600.71 with all the sectoral indices led by auto, power and healthcare trading higher. The gauge had rallied 184.84 points in the previous session.


The NSE index Nifty too climbed 46.10 points, or 0.54 percent to trade above the 8,500-mark at 8,543.15.


Brokers said fresh spell of foreign fund inflows and persistent buying by investors amid a firming trend overseas on growing confidence that market favourite Hillary Clinton will emerge victorious as the US president buoyed trading sentiment here.


Among other Asian markets, Hong Kong's Hang Seng was up 0.38 per cent and Japan's Nikkei gained 0.28 per cent, however, Shanghai Composite Index gained 0.21 per cent in early trade on Tuesday.


The US Dow Jones Industrial Average jumped 2.08 per cent in Monday's trade as global markets rallied.