UPDATE 1-WTO rules against tax break for Boeing 777X jet
November 28, 2016 at 10:07 AM EST
GENEVA, Nov 28 (Reuters) - The World Trade Organization (WTO) ruled on Monday a tax break from Washington state to help Boeing develop its new 777X jetliner was a prohibited subsidy, in a setback for the U.S. planemaker as it eyes victory in a parallel case against Airbus.