The Sensex at the Bombay Stock Exchange fell 47 points, or 0.3 per cent, to 17,891 in opening trade, today, as investors sold stocks, after IT bellwether, Infosys Technologies reported a 2.4 per cent decline in its consolidated quarterly net profit. Remaining subdued, the Sensex stood 53 points, or 0.3 per cent in the red, at 17,884, a short while ago.Other Asian markets in China, Japan, Indonesia, Singapore, Hong Kong and Taiwan were down between 0.1 per cent and 1.5 per cent, after the Chinese government said it will strictly enforce policies enacted to quash real estate speculation.