Oil prices slumped on Wednesday, with U.S. crude headed for its sharpest daily loss since late May, after the first rise in crude stockpiles in the United States in more than two months. The dollar’s rally on Greece’s debt default, Iran’s renewed efforts to reach a nuclear deal with the West to freely resume its crude exports, and signs of OPEC output at three-year highs, further weighed on the market. The U.S. Energy Information Administration (EIA) said crude inventories rose by 2.4 million barrels last week, the first weekly build since April and versus a 2 million-barrel draw forecast by analysts in a Reuters ... (full story)