The Indian rupee strengthened by 90 paise against the US dollar on Monday, to trade at four-week high of 62.58 at the Interbank Foreign Exchange market, on increased capital inflows and dollar selling by exporters.
The Indian currency had settled at 63.48 against the Greenback on Friday, up marginally by two paise over previous day's close.
Traders said apart from selling of the American currency by exporters and banks, a higher opening at the domestic equity market and dollar's weakness against other overseas currencies, after Larry Summers, the man tipped to be named Ben Bernanke's successor as Fed chairman, withdrew from the race, also supported the rupee.
Meanwhile, the BSE Sensex soared over 200 points in morning trade to cross the 20,000-level.