Output from Saudi Arabia and Iraq helped lead to the fourth straight monthly increase from the Organization of Petroleum Exporting Countries, a survey found. A survey by energy reporting service Platts finds OPEC production in June reached 31.3 million barrels per day, a 5.5 percent increase from May and the fourth straight month of gains from the 12-member group. Saudi Arabia, the de facto leader of OPEC , produced an average 10.3 million bpd in June, about 1 million barrels more than the United States. The increase in production from U.S. shale basins is keeping markets weighted on the supply side. Saudi Arabia has said it would keep its output higher despite the glut in an effort to stay competitive […]