* Bond markets sell off after Fed comments * Positive earnings help ease global growth concerns (Changes lead paragraph, recasts throughout, updates prices, adds new quote, adds European market close) The Fed, as expected, said it will no longer add to its holdings of Treasury bonds and mortgage-backed securities, effectively ending a program that at its peak pumped $85 billion a month into the financial system to hold interest rates down and boost the flagging economy. The Fed also expressed confidence in the U.S.