The sensex today fell by over 49 points to 20,849 in early trade. Funds and retail investors booked profits after recent gains after India's current account gap narrowed sharply to 5.2 billion, or 1.2 per cent of GDP, in the July-September quarter of the current financial year.The 30-share barometer had gained 478 points in the previous three sessions, moved down by 0.24 per cent led by the weakness in banking, FMCG, realty and power sector stocks.The wide-based National Stock Exchange index Nifty, moved down 15 points, or 0.24 per cent, to 6,203.Brokers said besides profit-booking by participants, a mixed trend at the Asian markets, influenced the sentiment.In the Asian region, Nikkei at the Japan stock market, was trading 0.59 per cent higher, while Hong Kong's Hang Seng index shed 0.63 per cent in early trade today.The US Dow Jones Industrial Average ended 0.48 per cent down in yesterday's trade.