Kansas City Fed President Esther George and Boston Fed chief Eric Rosengren have signalled they do not support insurance rate-cuts in the wake of a recent spate of stronger-than-forecast data on employment and inflation in June. They are also concerned that rate cuts when the economy is still expanding may increase risks to financial stability.

"Both appear to favour a 'wait-and-see' approach in evaluating risks to the outlook," the Barclays economists wrote in a research note.

(Reporting by Richard Leong; Editing by Chizu Nomiyama)