India, Jan. 12 -- Indian rupee strengthened marginally against the US dollar on Tuesday amid sustained foreign inflows. Foreign Institutional Investors (FIIs) bought shares worth Rs 3,138.90 crore, while DIIs sold shares worth Rs 2,610.13 crore in the Indian equity market on Monday, exchange data showed. US President-elect Joe Biden, who takes office on January 20 with his Democratic party in control of both Houses, has promised trillions of fiscal spending and to speed up vaccinations, too supported the rupee. However, strength in the American currency overseas capped gains.The partially convertible currency is currently trading at 73.37, stronger by 3 paise from its previous close of 73.40 on Monday. The currency touched a high and low of...