The rupee was trading a tad strong at 66.33 in the evening session on sustained dollar selling by banks and exporters and dollar's weakness against other currenices overseas.

The rupee opened strong by 4 paise at 66.31 at the Interbank Foreign Exchange market today, extending its winning streak for the sixth day.

Forex dealers said that apart from sustained selling of the American currency by banks and exporters and crude oil falling to multi-year lows, dollar’s weakness against other currencies overseas supported the rupee.

They said, however, a weak domestic equity market capped the gains.

The local currency had gained five paise to close at 66.35 in yesterday’s trade.

Meanwhile, the benchmark BSE Sensex ended down by 145.25 points or 0.56 per cent at 25,590.65.