Natural-gas prices stayed lower Thursday after weekly government data showed that supplies grew more than expected last week. Producers added 97 billion cubic feet of natural gas into storage in the week ended Sept. 19, the U.S. Energy Information Administration said Thursday. Analysts and traders surveyed by The Wall Street Journal had called for a 92-bcf injection. The addition was larger than any of the survey projections. Though natural-gas supplies were largely depleted by record demand for the heating fuel last winter, inventories have rebuilt unusually quickly this spring and summer. Production has been higher than expected, and mild weather has kept demand low for gas-powered electric air-conditioning. As of Sept. 19, stocks stood at 2.988 trillion cubic feet, 13% below the five-year average for the week. However, prices pared losses after the report’s release despite the larger-than-expected build. Natural gas for October delivery recently […]