Fed minutes show uncertainty on future hikes

Federal Reserve policymakers at their May meeting considered raising a key interest rate by half a percentage point before deciding on a quarter-point increase, minutes published Wednesday 31 May showed.

Chairman Ben Bernanke and his Fed colleagues also decided to leave the door open to additional rate increases "in view of the risk that the outlook for inflation could worsen," according to minutes of the Fed's May 10 meeting.

Policymakers deemed their action to raise interest rates a quarter-p