The Bombay Stock Exchange benchmarkSensex lost over 61 points or 0.4 percent to 17390 in the opening trade today, amid a weak trend in the global markets. Remaining weak, the sensex stood 26 points or 0.2 percent in the red, at 17425 a short while ago.Stock markets in China , Hongkong, singapore, Japan, Taiwan and South Korea were trading mixed today. The US Dow Jones Industrial average ended 0.41 per cent down in yesterday's trade.