The 30-share Sensex closed at 31,646.46, showing net gain of 258.07 points or 0.82 per cent as index major RIL, ITC, HDFC, L&T and HDFC Bank advanced.
The 50-share NSE Nifty reclaimed the key 9,900-mark in day trade but profit-booking at higher levels trimmed its gains. The index settled at 9,884.40, up by 88.35 points, or 0.90 per cent.
The rally in domestic equities was largely in line with the upmove seen in global stocks on signs of easing geopolitical tensions after US President Donald Trump's measured response to North Korea missile launches.
Sentiment also got a boost after the GST revenue got off to a bumper start. Finance Minister Arun Jaitley yesterday said that taxes worth Rs 92,283 crore were collected in July from just 64.42 per cent of the total taxpayer base.
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Tax collections are likely to go up further when all the tax payers would file returns.
In the Sensex kitty, Reliance Industries emerged top performer by surging 2.12 per cent to Rs 1,564.15, followed by Adani Ports that rose 1.94 per cent to Rs 389.65.