U.S. crude and Brent, the global benchmark, each fell 22% last month, the sharpest monthly slide since October 2008. U.S. crude traded below $50 a barrel on an intraday basis this week for the first time in nearly 14 months, while Brent dipped below $60. Both gauges are down roughly a third this quarter. The sudden declines followed crude hitting nearly four-year highs , wrong-footing investors who believed oil could surge as high as $100 a barrel. The reversal makes the coming meeting of the Organization of the Petroleum Exporting Countries and its allies possibly the most consequential such gathering in four years. The group begins its meeting Thursday in Vienna, following a Group of 20 summit in Buenos Aires this weekend that could lead to early discussions on a deal to cut production levels. At a meeting in late 2014, the global oil cartel decided to keep pumping […]