Unseasonably warm weather in December has eased supply concerns. European Pressphoto Agency Mild temperatures across the U.S. have sent natural-gas futures tumbling to their lowest level in nearly two years, more good news for consumers already reaping the benefits of a 30% decline in gasoline prices. Natural-gas prices dropped 9% Monday, their largest decline since February, after the government said gas stockpiles rose above year-ago levels for the first time in 2014. Record U.S. oil and gas production, which has played a major role in driving the 48% decline in crude prices since June, is overwhelming tepid demand for home-heating fuels amid an unseasonably warm December. Many investors who earlier this year placed bets on rising gas prices have had to reverse course and cover those bets, as strong production has now closed a stockpile shortage that had lingered […]