The rupee firmed up by 4 paise to 67.29 against the dollar in early trade today on increased selling of the US currency by exporters and banks amid a higher opening in the domestic equity market. Forex dealers said weakness in the dollar against other currencies overseas supported the rupee.
Further, a higher opening in the domestic equity market gave the uptrend some momentum, they added. On Wednesday, the domestic unit rebounded from its 2-1/2 month low with an impressive 42-paise gain to close at 67.33 - its sharpest single-day jump in over two months.
Meanwhile, the benchmark BSE Sensex rose 187.44 points, or 0.72 per cent, to 26,068.61, in early session today.