US Airline Bonds Weaken as Mideast War Lifts Jet Fuel Costs

US airline-company debt weakened on Monday after soaring jet fuel costs stirred investor fears about lower earnings and credit ratings downgrades.

Five-year credit default swaps, a measure of the price investors pay to insure their credit exposure, signaled heightened investor concern by hitting their highest levels since November for United Airlines, Southwest Airlines, and JetBlue Airways, Bloomberg data showed on Monday. For Delta Air Lines, CDS jumped to the highest since June.