-Natural-gas prices closed at a two-week high as warming weather forecasts encouraged an end to aggressive selling, analysts said. Prices for the front-month September contract settled up 6.3 cents, or 1.6%, to $3.897 a million British thermal units on the New York Mercantile Exchange. The gains broke gas out of a 17-cent trading range it had stayed in since July 21, with nearly all of the gains Tuesday coming within a few minutes after the trading floor opened at 9 a.m. Analysts are saying the move likely confirms an end, or at least a break, in the steep selloff gas had seen for most of the summer. Prices dropped 21% between June 12 and July 23, which should have enticed more power generators to switch from coal to gas, several analysts have said. The weather has also stabilized. Much of the country is still likely […]