New Delhi - India's benchmark Sensex stock index gained 3.69 per cent in early trading Friday on US government plans for a mammoth bailout to contain its financial crisis.

The 30-share-sensitive index, which had been losing ground for most of the week because of the US crisis, gained 491 points soon after the markets opened. It was quoted at 13,787.11 at 11:30 local time (0600 GMT).

Similarly, the broader National Stock Exchange's Nifty index rose 2.9 per cent to 4,155.15 at the same time as all industrial sectors, led by blue-chip stocks, recorded handsome gains.

Market analysts said the trading sentiment was bullish after sharp global stock increases and a US rescue plan for banks in the wake of the crisis sparked by losses related to US subprime mortgages. (dpa)