An electronic display identifies the post that trades SandRidge Energy stock on the floor of the New York Stock Exchange January 11, 2013. Nearly 15 years since Enron’s collapse decimated the retirement accounts of its employees, hundreds of thousands of U.S. energy workers remain precariously exposed to big, concentrated bets on company stock in their 401(k) retirement plans. The slide in oil prices to their lowest levels in over a decade wiped out several billion dollars of retirement wealth in the energy sector in the past year. The losses may prove temporary for companies that successfully navigate the crisis, but tens of thousands of employees of struggling firms may see much of their nest eggs gone for good. In Oklahoma and Texas, workers are delaying retirement plans, surrendering trucks, cars and land in personal bankruptcy cases, or just praying oil prices will recover. “I just didn’t see it coming,” […]