Wall Street was still grappling with the Fed's decision to keep interest rates unchanged, as three of its 12 policymakers dissented from the vote in favor of a hike.
Confusion centered on the press conference from new Fed Chair Kevin Warsh, who was presiding over his second meeting. Warsh repeated his firm intent to bring inflation down to 2%, but investors expressed uncertainty about how he planned to reach that longstanding target.
Data on Thursday showed the core Personal Consumption Expenditures Price Index — an inflation gauge the Fed tracks — rising 3.3% year on year in June.
Warsh's aim to reduce the Fed's guidance telegraphing its rate plans could also bring new market scrutiny to economic data, including the upcoming jobs report.
The new leadership at the Fed is "a meaningful change in terms of mindset around forward guidance, transparency and communication," said Jim Baird, chief investment officer with Plante Moran Financial Advisors.
"What we'll likely see as a result is the potential for maybe a little bit more volatility around key economic releases ... because there's just a little less clarity around where we're heading."
The nonfarm payrolls report for July is expected to show an increase of 91,000 jobs, and an unemployment rate of 4.3%, according to a Reuters poll.
Given the Fed's focus on inflation, a significantly higher job growth number could raise concerns about an overheated economy and firm up bets on rate hikes. Fed funds futures as of Thursday were indicating a 64% chance of a rate increase at the Fed's next meeting in September, according to LSEG data.
"If there was an unexpected heating up of labor conditions, that would contribute almost unambiguously to a Fed more likely to raise at the next meeting," Baird said.
More than one-quarter of the S&P 500 is due to post results next week. Reports include Caterpillar CAT.N, Palantir PLTR.O and Merck MRK.N.
Second-quarter profits overall are tracking for a big jump. Including companies that have reported along with estimates for the rest, S&P 500 earnings are on pace to rise 27.7% on an adjusted basis from a year ago, according to LSEG IBES data as of Wednesday.
"The earnings picture overall should provide stability," PNC's Ma said.