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

Walmart was one of the market’s heaviest weights and dropped 4.5% after reporting a profit for the spring that came up short of analysts’ expectations, while Nvidia and other Big Tech stocks held a bit steadier following two days of sharp swings.

At the end of the week, investors look forward to Powell's speech at the annual Jackson Hole Economic Symposium.