The Sensex at the Bombay Stock Exchange trimmed much of its initial losses in afternoon trade, to stand just 4 points in negative territory, at 20,278, amid very volatile trade, a short while ago. Earlier in the morning, the Sensex had declined 54 points, or 0.3 per cent, to 20,228, on sustained selling by funds, after weak domestic economic data, and amid falling regional markets.Stock markets in Japan, China, Taiwan, South Korea, Singapore, Hong Kong and Indonesia had lost between 0.5 percent and 2 percent, today, on concerns that the US Federal Reserve may soon start reducing its monetary. stimulus. The US Dow Jones Industrial Average had ended 0.2 per cent lower in yesterday's trade. PTI