The BSE Sensex was trading 336 points up at 21,045 points, a shortwhile ago. It regained psychological 21,000 level by surging 439 points to trade at 21,148 in the opening trade on heavy fund inflows amidst exit polls forecasting good show by the BJP in state assembly elections. The 30-share index had lost 189 points in the previous two sessions. All the sectoral indices, led by banking, capital goods and realty, were trading in positive zone.

The National Stock Exchange Nifty was also trading 106 points up at 6,267 points, a shortwhile ago.

The rupee today rose by 30 paise to trade at fresh one-month high of 61.75 against the dollar in early trade at the Interbank Foreign Exchange market on increased selling of the US currency by exporters, amid sustained foreign capital inflows. Strengthening of other currencies against the dollar overseas and a higher opening in the domestic equity market also supported the local currency.

The rupee had gained 31 paise to close at one-month high of 62.05 against the dollar in yesterday's trade.