Natural-gas prices inched up Thursday after government data showed a smaller-than-expected addition to stockpiles. The U.S. Energy Information Administration said stockpiles grew by 73 billion cubic feet last week, compared to the 78 bcf expected by 17 forecasters surveyed by The Wall Street Journal. The report is a widely watched measure of supply and demand. A smaller-than-expected addition to storage likely indicates smaller supply or larger demand than expected. Natural gas for June delivery settled up 3.8 cents, or 1.9%, to $2.039 a million British thermal units on the New York Mercantile Exchange. The gains are only the second in the past six sessions and pull gas off a three-week low it hit Wednesday. A cooler-than-normal spring has led to stronger-than-expected heating demand, said Andy Huenefeld, price risk manager at U.S. Energy Services Inc. in Louisville, Ky. Production has also been about 3% weaker this month than the record […]