Stocks were poised for a mixed open Friday as futures struggled for

direction ahead of Federal Reserve Chairman Kevin Warsh's hotly-anticipated speech at the Jackson Hole symposium.

After Nvidia's earnings helped lift sentiment in the prior session, futures on the S&P and the Nasdaq were down, while the Dow was in positive territory.

The moves come as investors question how the Fed will respond to the Treasury's intervention in the bond market, and seek insight into Warsh's view on inflation and whether the Fed will hold rates in September.

On the opening day of the symposium on Thursday, some Fed members warned of the risks of inflation staying elevated, hinting at a possible need to raise interest rates in the coming months.