The Indian rupee turned weaker against the US dollar on Friday tumbling as much as 31 paise as the benchmark BSE Sensex index slipped 286 points today. The rupee opened on a positive note today\u00a0rising for the fourth consecutive day in the morning trades on Friday. The domestic currency was on a rising streak since Monday this week but finished 31 paise lower vs the US dollar today. The rupee shed\u00a031 paise at 64.22 apiece US dollar at the interbank foreign exchange market on Friday. During the day, the rupee hovered in the range of 63.82 to 64.23 against the US dollar.\u00a0The Reserve Bank of India fixed the reference rate of the rupee at 63.9097 against the US dollar on Friday. In the early morning deals today, the rupee got appreciated by 9 paise to 63.82 after opening marginally up at 63.89\u00a0against the US dollar. However, over the course of this week, the Indian rupee had advanced 18 paise vs the US currency with the major rise coming in last two day's when rupee gained 41 paise.\u00a0Earlier yesterday, the rupee\u00a0tripped below the 64-mark for the first time in the month of February\u00a0gaining as much as\u00a018 paise to close at 63.91 against the US dollar. On Thursday, the\u00a0inflation based on wholesale prices eased to a six-month low of 2.84%\u00a0in January on cheaper food articles even as vegetable prices continued to rule high. In the meantime, the US dollar slipped to its lowest levels in more than three years against a basket of currencies on Friday, headed for its biggest weekly loss in two years as negative sentiment offset any support the greenback could take from rising Treasury yields, Reuters said in a report. Indian stock markets finished on a negative note with the Sensex losing as many as 286 points and Nifty concluding below 10,500-mark. The S&P\u00a0BSE Sensex\u00a0tumbled\u00a0286.71 points or\u00a00.84% to close at\u00a034,010.76 whereas NSE Nifty lost\u00a093.2 points or\u00a00.88% to end at\u00a010,452.3. Shares of heavyweight companies such as ICICI Bank, Reliance Industries, L&T, State Bank of India, Maruti Suzuki, HDFC, ITC, Yes Bank, IndusInd Bank, Axis Bank, Tata Motors, and Bharti Airtel contributed heavily in the Sensex plunge, jointly washing away as many as 270 points out of the index.