Oil prices fall as economic concerns rise

By Henning Gloystein SINGAPORE (Reuters) - Oil prices fell on Monday, weighed down by Asia's darkening economic prospects and a related strengthening in the U.S. dollar, which makes fuel imports for countries using other currencies more expensive. Brent crude oil futures fell back below $50 per barrel, trading at $49.89 at 0644 GMT, down 65 cents, or 1.29 percent, from their last settlement. "A strong dollar is helping bring prices down as well as fairly weak data from Asia," said Matt Stanley o