Mumbai, Jan. 7 -- The Indian rupee rose 31 paise to close at 89.87 (provisional) against the US dollar on Wednesday, a one-week high on falling international global crude oil prices. Besides, possible intervention by the Reserve Bank of India (RBI) may also have supported the counter, although muted local equities capped upside. Indian shares ended slightly lower on Wednesday to extend losses for a third day running as rising geopolitical tensions and tariff-related concerns overshadowed investor optimism around the earnings outlook. The benchmark S&P/BSE Sensex dropped 102.20 points, or 0.12 percent, to 84,961.14, while the broader NSE Nifty index ended down 37.95 points, or 0.14 percent, at 26,140.75. At the interbank foreign exchange, ...