Natural-gas prices fell to one-month lows, pressured by forecasts for unusually warm weather across the U.S. this month. The benchmark futures contract dropped 13.3 cents, or 3.3%, to $3.874 a million British thermal units, extending a selloff that has brought losses in the heating fuel to 14% in the past two weeks on the New York Mercantile Exchange. Unseasonably warm forecasts are keeping investors from placing bullish bets, analysts say. Half of all U.S. homes use natural gas for heating, making weather a major driver of prices in the gas market. Lacklaster demand owing to mild weather could further weigh on prices, traders say, amid expectations that record U.S. gas production will keep supplies abundant. Prices shot above $4/mmBtu last month as a polar front across much of the U.S. dragged down average temperatures for November. Some meteorologists say that system is about to move out, […]