• In this Thursday, July 21, 2016, file photo, European Central Bank President Mario Draghi speaks during a news conference in Frankfurt, Germany, after a meeting of the governing council. The Federal Reserve, the European Central Bank and the Bank of Japan have pumped trillions of dollars into global financial markets and taken the radical step of pushing interest rates below zero in Europe and Japan. But the results have been lackluster. (AP Photo/Michael Probst, File)

    Bold moves, tepid gains: Have central banks met their limit?

    WASHINGTON (AP) — The world’s key central banks have worked themselves into contortions to try to rev up economic growth, raise inflation and coax consumers and businesses to borrow and spend more.