Natural-gas futures closed lower Thursday after a weekly stockpile update showed a larger-than-expected surplus. Prices for the front-month October contract settled down 10.3 cents, or 2.6%, at $3.91 a million British thermal units on the New York Mercantile Exchange. The retreat put natural gas back in the middle of a 32-cent range it has traded in for nearly all of the past two months. Producers added 90 billion cubic feet of gas to storage for the week ended Sept. 12, the U.S. Energy Information Administration said. The addition was larger than the 89 bcf consensus average expectations of analysts and brokers in The Wall Street Journal survey. Traders use the EIA update to gauge how quickly stockpiles are recovering from high demand that drained them to 11-year lows this winter. Last week’s addition refilled stockpiles to 2.9 trillion cubic feet, about 13% below the five-year […]