The Indian rupee moved up marginally by 4 paise to Rs 51.91 per US dollar in morning trade on the Interbank Foreign Exchange today, tracking gains registered by the euro overseas against the American currency.
Forex dealers said dollar weakness against the euro and other currency rivals overseas and a higher opening in the domestic stock market supported the Indian rupee's rise.
The rupee rose by 30 paise to close at a one-week high of Rs 51.95/96 against the dollar in the previous session on fresh dollar-selling by exporters.
Meanwhile, the BSE benchmark Sensex was up by 98.37 points, or 0.61%, at 16,068.76 in opening trade today.