The Bombay Stock Exchange benchmark Sensex rose by 400 points in afternoon trade on Wednesday on buying by funds and retail investors after Finance Minister Pranab Mukherjee ruled out withdrawal of stimulus packages. The 30-share index rose by 218 points to 15,623 with all the sectoral indices gaining up to 2.82 per cent. The BSE barometer had lost over 1,405 points in the previous six sessions to hit two-month lows. The wide-based National Stock Exchange index Nifty moved up by 64 points to 4,628 points. Brokers said, sentiments turned better after Mr Mukhejee ruled out withdrawal of stimulus packages till the economic recovery is on a strong footing.