The Sensex at the Bombay Stock Exchange fell 130 points, or 0.7 per cent, to 18,185 in opening trade, this morning. Later, the Sensex lost further ground, and stood 263 points, or 1.4 percent in negative territory, at 18,052, in afternoon trade, a short while ago. The domestic market fell on profit-booking by investors, amid GDP growth concerns, and falling global markets. Other Asian bourses in Japan, China, South Korea, Singapore and Hong Kong were down by between 1 percent and 2.4 percent, today, after fresh indications that US manufacturing is slowing.