Natural Gas Falls on Warm December Weather

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…