Inflation could top 4% this week. The bond market wants Fed Chair Warsh to prove he’ll fight it.

Inflation expectations are rising ahead of this week's Consumer Price Index (CPI) release, with markets bracing for a potential reading above 4%—a level that would test newly appointed Fed Chair Warsh's commitment to price stability. This development comes as bond markets have been repricing their expectations for the Fed's policy path, reflecting concern that inflation pressures may be more persistent than previously anticipated. A CPI print above 4% would represent a significant threshold, potentially reigniting debate about the adequacy of current monetary policy and the Fed's inflation-fighting credibility under new leadership.

If the inflation data confirms these elevated expectations, the bond market would likely face a substantial repricing of the terminal rate path, with immediate spillover effects across rate-sensitive asset classes. Longer-dated Treasury yields would come under pressure, equities—particularly growth and technology stocks that benefit from lower rates—could experience volatility, and the entire curve would need to reassess where interest rates settle over the coming quarters. Market participants will be closely watching not only the headline number but also core inflation metrics and Chair Warsh's subsequent communication for clues about the Fed's willingness to take additional action if price pressures persist.