Sensex and Nifty closed lower for the fourth consecutive session on Wednesday with investors awaiting cues from the U.S. Federal Reserve on the rate at which tapering would be undertaken. The concern follows after the U.S. inflation rose to its highest level since 1982 at 6.8 per cent in 2021. The concerns were accompanied by index heavyweights such as Infosys, Bajaj Finance, Tata Consultancy Services and HDFC - all closing in the red.