The Indian rupee on December 21, Tuesday,   gained 31 paise to close at 75.59 against the US dollar, as positive domestic equities and a weak US currency in overseas markets boosted investor sentiment.

The domestic unit opened strong at 75.74 against the greenback on the interbank forex market, with an intraday high of 75.41 and a low of 75.74 recorded during the day's trade. It eventually settled at 75.59 cents on the dollar. The rupee had settled at 75.90 against the US dollar in the previous session.

Meanwhile, the dollar index, which measures the strength of the US currency against a basket of six currencies, fell 0.20 percent to 96.35. Brent crude futures, the global benchmark for oil, rose 0.87 percent to USD 72.14 per barrel.

On the domestic equity front, the BSE Sensex rose 497.00 points, or 0.89 percent, to end at 56,319.01, while the NSE Nifty gained 156.65 points. According to exchange data, foreign institutional investors continued to be net sellers in the capital market on Monday, offloading shares worth Rs 3,565.36 crore.

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