The Sensex at the Bombay stock Exchange fell 91 points, or 0.5 per cent, to 19,052, ahead of domestic industrial output data, on continued selling by funds, amid weak regional bourses. Later, the Sensex trimmed it losses, and stood 40 points, or 0.2 percent in the red, at 19,103 in afternoon trade, a short while ago.Stock markets in Japan, Indonesia, Singapore and South Korea had lost between 0.3 percent and 1.9 percent, today. The US Dow Jones Industiral Average had fallen 0.8 percent in yesterday's trade.