US stock futures wavered as investors digested another difficult day for tech stocks and persistent uncertainty on Federal Reserve policy.

Wall Street is ticking lower in premarket trading Thursday as investors perused Walmart's latest financial results ahead of Federal Reserve Chair Jerome Powell's highly anticipated speech on Friday. Futures for the S&P 500 turned 0.

The consumer price index for July will come out on Tuesday, and Wall Street expects a 0.2% monthly overall increase and a 0.3% uptick in the core CPI.

Futures tracking Canada's main stock index edged down on Thursday, mirroring Wall Street's moves, as investors avoided risk ahead of the U.S. Federal Reserve's three-day Jackson Hole symposium.

Palo Alto Networks jumped 6.3% overnight after the cybersecurity company beat Wall Street’s sales and profit forecasts. The California company also announced the retirement of Nir Zuk, its founder, chief technology officer and board member.

Berkshire Hathaway takes new stakes in UnitedHealth, Nucor. Intel spikes on speculation US considers taking stake in chip company. Airbnb launches more flexible payment options.

Dow futures flat as Wall Street eyes retail earnings, Fed signals from Jackson Hole, Intel’s $2B boost, and oil talks.

Wall Street continues to drift Wednesday while news of a leadership change at Target took some of the spotlight away from the latest batch of corporate earnings reports. Futures for the S&P 500 were 0.