The Indian rupee depreciated against the US dollar on Friday, closing at 89.86 or 89.90, down 15 to 23 paise. This decline was attributed to foreign fund outflows, rising crude oil prices, importer demand for dollars, and uncertainties surrounding a trade deal. Domestic equities also saw a negative trend, with major indices like the Sensex and Nifty declining. Forex markets were closed on Thursday for Christmas.