Construction of the 713-mile Rover pipeline ran into trouble this spring. Goldman Sachs Group Inc. GS -1.86% lost more than $100 million in a wrong-way bet on regional natural-gas prices this spring, a setback that played a large role in the New York bank’s subpar second-quarter trading performance. Goldman wagered that gas prices in the Marcellus Shale in Ohio and Pennsylvania would rise with the construction of new pipelines to carry gas out of the region, said people familiar with the matter. Instead, prices there fell sharply in May and June as a key pipeline ran into problems . Goldman said in July that the quarter ended June 30 was the worst ever for its commodities unit, which has been one of the firm’s most consistent profit centers and a training ground for many of its top executives, including Chief Executive Lloyd Blankfein. The setback extended a broader trading […]