The rupee witnessed range-bound trade and settled for the day higher by 6 paise at 83.90 against the US dollar on Friday supported by weakening of the American currency in the overseas market and significant foreign fund inflows. In the domestic equity market, the 30-share BSE Sensex declined 71.77 points, or 0.09%, to close at 82,890.94 points, while the Nifty …