Shares of U.S. LNG producers jumped in early trading Monday after the European Union agreed to dramatically increase its energy imports from the United States, pledging $250 billion in annual purchases under a new transatlantic trade framework. The move includes LNG, oil, and nuclear energy and was announced in Brussels earlier today. Cheniere Energy, NextDecade, and Venture Global were among the biggest pre-market gainers, with some stocks rising as much as 8.8% before the U.S. market opened. Analysts cited expectations of increased long-term…