As a historic oil and gas boom transforms the U.S. energy sector, Wall Street is losing the battle to remain the partner of choice for energy producers and major consumers seeking to protect themselves against volatile prices. In the thriving Texas Permian oil patch and beyond, banks are being edged out by a handful of the world’s biggest corporations including BP Plc, Cargill and Koch Industries. With Wall Street hamstrung by growing regulatory restrictions, a recently finalized ban on proprietary trading and increased capital requirements, these corporate behemoths are leveraging their robust balance sheets and savvy global trading desks to capture as much as a quarter of the global multibillion-dollar market for hedging commodity prices. New risks have arisen this year that could tilt the scales further, as the Federal Reserve considers limiting banks’ ability to trade in real physical markets, the kind of deals […]