An inflation measure closely watched by the Federal Reserve stayed elevated last month in the latest sign that many Americans are still struggling with higher costs.

Federal Reserve officials expressed concerns about stubbornly high inflation at Jackson Hole. Some policymakers believe further interest rate increases may be necessary soon.…

Fed Chair Kevin Warsh reiterated his commitment to fighting inflation in a major speech — raising expectations that rate hikes may be coming, though he did not clearly spell out a…