Scripting its second biggest single-day crash this year, the home currency ended with a steep loss of 62 paise at 67.25 per dollar -- the weakest closing since July 26 when it had closed at 67.27.
A massive selloff in domestic equities which tumbled to multi-month lows on the back of roller-coaster global markets further added to the woes of local unit.
The dollar strengthened against the major world currencies on speculation that the policies of US President-elect Donald Trump would be inflationary leading to rise in interest rates which could hit capital flows to emerging markets like India, a dealer said.
Meanwhile RBI has been intervening heavily in both spot and forward markets to defend the currency, a forex trader commented.
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Extreme caution ahead of the IIP data for September alongwith Wholesale Price Inflation and Consumer Price Inflation data for October on Tuesday also weighed on trade, he added.
The rupee resumed with a gap-down at 67.20 from overnight finish of 66.63 at the Interbank Foreign Exchange (Forex) market following frantic demand for the dollar from importers and corporates even as dramatic pickup in volatility kept local unit under immense pressure throughout the day.
The dollar Index was quoted a tad higher 0.02 per cent at 98.81 in the afternoon trade.
Meanwhile, RBI today fixed the reference rate for the dollar at 67.0292 and euro at 73.1155.