Continuing to fall for the third straight session, the Sensex at the Bombay Stock Exchange lost 113 points, to 20,476 in opening trade, today, on sustained selling pressure, triggered by weak Asian markets. Selling pressure later intensified after the release of disappointing industrial output data for September, with the Sensex standing 313 points, or 1.5 per cent in the red, at 20,276, a short while ago.Stock markets in Japan, South Korea, Hong Kong, Indonesia, Singapore and Taiwan were down by between 0.1 per cent and 2 per cent, today. China's key stock index dived over 5 per cent, on reports that China may set new rules that prohibit foreign companies from buying property there. Over in the US, the Dow Jones industrial average had lost 0.7 per cent, overnight.