The BSE benchmark Sensex is down by 45 points to 20,202 in afternoon trade today. Earlier, in the morning, the Sensex had opened with a gainded of 54 points.Similarly, the wide-based National Stock Exchange index, Nifty, down by 13 points to 6,156.In Asia, Japan's Nikkei up by 0.35 per cent, in early trade, while Hong Kong's market remained closed. The US Dow Jones Industrial Average ended 0.28 per cent lower in yesterday's trade.