The Indian rupee weakened to an all-time low on Wednesday as early results of the U.S. presidential election spurred a rally in the U.S. dollar, prompting the central bank to intervene. The rupee fell to 84.1950 against the dollar, down about 0.1% from its Tuesday close. The rupee's relatively muted response was due to RBI likely selling dollars, like it has done many times the last month.