NEW YORK (Reuters) -Federal Reserve Chair Jerome Powell's closely watched Jackson Hole speech on Friday boosted optimism in markets that the U.S. central bank is poised to ease rates, sending investors to pile into riskier assets and interest-rate-sensitive sectors.

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If inflation starts climbing again after a rate cut, “the Fed will have to reverse course — and in the worst case, start hiking again,” Slok said.

Brent Donnelly of Spectra Markets ran a sizeable survey of expectations for Fed Chair Jerome Powell's speech, and of the 473 responses, 51% expect a neutral-to-boring outcome and 43% see a hawkish tint.

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World shares are mixed after Wall Street fell to a fifth straight loss, and as traders look for cues about U.S. monetary policy from a meeting of central bankers in Jackson Hole, Wyoming