U.S. stock market futures were mixed Friday ahead of a pivotal speech from Fed Chair Jerome Powell in which the central bank chief will set out his views on where to take interest rates. Dow Jones Industrial Average futures rose 60 points,

Future tied to Wall Street's main stock indexes inched higher on Friday in the run-up to Federal Reserve Chair Jerome Powell's speech at the Jackson Hole Economic Symposium, which would shed more light on the interest-rate path.