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

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.

Gold slipped on Friday due to a firmer dollar, with markets awaiting U.S. Federal Reserve Chair Jerome Powell's speech at the annual Jackson Hole symposium for more insight on the Fed's monetary policy path.

In a typical year, Jackson Hole sparks excitement mostly among market watchers. This time, the symposium feels more pivotal.

Fed Chair Jerome Powell's address on Friday and Nvidia earnings after the close on Wednesday may hold the keys as to whether the bull market can continue. "In the near-term, if Chair Powell can give a market-friendly speech and NVDA can meet,