The Sensex at the Bombay Stock Exchange lost 126 points, or 0.7 per cent, to 18,006 in opening trade, this morning, on continued selling by cautious investors, hours before the Reserve Bank of India's monetary policy review announcement. Later, after the policy announcement, the Sensex remained weak, and stood 94 points, or 0.5 percent in the negative zone, at 18,038, a short while ago. The bourses in Japan, China, Hong Kong, Indonesia, Singapore, South Korea and Taiwan were down by between 0.8 percent and 1.7 percent, today, dragged down by the debt crisis of Greece, and more disappointing US economic data. On Wall Street, the Dow Jones Industrial Average had slumped 1.5 per cent, overnight.