WTI headed for the longest run of weekly declines in almost three decades and Brent was set for a record losing streak amid speculation that OPEC will refrain from cutting production to ease concern of a supply glut. Futures fell as much as 1.3 percent in New York and were poised for a seventh weekly drop, the longest stretch of decreases since March 1986. Slumping prices reflect a widening consensus that the Organization of Petroleum Exporting Countries will maintain output, according to Goldman Sachs Group Inc. Crude stockpiles at Cushing, Oklahoma , the delivery point for West Texas Intermediate contracts, rose to the highest level since May, a U.S. government report showed. Oil has collapsed into a bear market as leading OPEC members resisted calls to cut production and instead reduced export prices to the U.S., where output has climbed to the highest level in 31 years amid a […]