Falling in tandem with melting global markets, the Sensex at the Bombay Stock Exchange closed with a big loss of 387 points, or 2.2 percent, at 17,306, today. The Nifty at the National Stock Exchange slumped 121 points, or 2.3 percent, to 5,211. Stock markets in Japan, China, Hong Kong, Singapore, and South Korea were beaten down by 2.2 percent to 4.3 percent.