OPEC on Tuesday raised its forecast of oil supplies from non-member countries in 2015, a sign that crude’s price collapse is taking longer than expected to hit U.S. shale drillers and other competing sources. In a monthly report, the Organization of the Petroleum Exporting Countries (OPEC) forecast no extra demand for its crude oil this year despite faster global growth in consumption, because of higher-than-expected production from the United States and other countries outside the group. Oil LCOc1 is trading below $50 a barrel, close to its 2015 low after an 18 percent drop in July. But OPEC has refused to cut output, seeking to recover market share by slowing higher-cost production in the United States and elsewhere that had been encouraged by OPEC’s prior policy of keeping prices near $100. Earlier this year, OPEC slashed its prediction of non-OPEC supply for 2015, expecting lower prices to prompt a […]