The rupee on Friday posted its biggest jump against the US dollar in the last 11 months by gaining 74 paise to close at a one-month high amid signs of fresh capital inflows after a deal to resolve the euro zone debt crisis that sparked an intense dollar selling here. Completing straight three sessions of gains,the rupee settled at 48.76/77,up 1.49 per cent,over its last close on October 25. It posted its largest single session gain since December 1,2010.