The momentum behind wagers on rising oil prices picked up steam as U.S. drilling slows and producers face potential credit line cuts. Money managers’ long position in West Texas Intermediate crude climbed by 6.1 percent in the week ended Sept. 22, the most since January, according to data from the Commodity Futures Trading Commission. The jump in longs and a decline in shorts boosted their net-long position by 15 percent. U.S. crude output is down 470,000 barrels a day from a four decade high of 9.61 million in June, data from the Energy Information Administration show. Explorers idled U.S. oil rigs for a fourth week, Baker Hughes Inc. said Sept. 25. The latest round of credit line reevaluations is under way, and almost 80 percent of oil and natural gas producers will see a cut in the maximum amount they can borrow, according to a survey by the law […]