Natural-gas prices surged to their largest one-day gains since January after government data showed stockpiles grew less than expected. Prices for the front-month June contract settled up 14.5 cents, or 5.6%, at $2.751 a million British thermal units on the New York Mercantile Exchange. The market flipped from morning losses of 1.5% as traders were expecting one of the largest surpluses on record for April. That didn’t materialize, sparking the type of rally that is more common for gas in the dead of winter, when heating demand surges—not the spring, when that demand wanes. The settlement is the highest since March 24 and reverses, at least temporarily, what had been a monthlong grind downward. The June contract rose 4.2% in April. The U.S. Energy Information Administration […]