OPEC trimmed estimates for supplies from outside the group in 2016 as the slump in prices takes its toll on the U.S. shale-oil industry. The Organization of Petroleum Exporting Countries cut 2016 estimates for non-OPEC output by 110,000 barrels a day, its Vienna-based secretariat said Monday in its monthly market report. Still, the group sees non-OPEC supply expanding slightly next year, while the International Energy Agency on Friday predicted a contraction of 500,000 barrels a day, the biggest since 1992. Saudi Arabia told OPEC it curbed output in August to a six-month low. “There are signs that U.S. production has started to respond to reduced investment and activity,” OPEC said in the report. “Indeed, all eyes are on how quickly U.S. production falls.” West Texas Intermediate crude futures have tumbled more than 50 percent in the past year, triggering an unprecedented cutback in drilling that threatens to end the […]