Oil prices extended their slide on Tuesday as investors awaited the outcome of the Iranian nuclear talks, which could pave the way for more Iranian crude flooding the already oversupplied global market. Iran and six global powers set Tuesday as the deadline to agree on a framework agreement that would outline the main elements of a deal constraining Iran’s nuclear program in exchange for lifting international sanctions. May-dated Brent crude fell 1.6% to $55.41 a barrel on London’s ICE Futures exchange. On the New York Mercantile Exchange, light, sweet crude futures for delivery in May traded at $47.81 a barrel, down 1.8% from Monday’s settlement. Russia’s foreign minister, who left the nuclear talks in Switzerland on Monday, is planning to return on Tuesday afternoon in a sign that an agreement might be close. Many in the oil market fear that if the sanctions […]