Fed Chair Warsh may be misreading an important bond market signal

• Key insight: The Fed chair attributed recent rising bond yields to a strong economy. However, investors are probably also responding to other factors, including Warsh’s own comments about potential changes to inflation measures.
• What’s at stake: Warsh appears unaware that his own statements about the Fed’s five recently formed policy review task forces may be influencing the U.S. bond market.
• Forward look: When a sitting Fed chair signals that the measurement of U.S. inflation, which underpins inflation-linked Treasuries, could potentially be subject to revision, one would anticipate that investors in those securities might take note and respond.

At last week’s Federal Open Market Committee meeting, new Federal Reserve Chair Kevin Warsh highlighted the move in Treasury real yields as one of the two most significant economic developments since the June FOMC meeting, stating that “nominal and real yields are materially higher across the Treasury curve” and that the increases ranked “around the top decile” of the most significant inter-meeting moves in the last two decades.

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When pressed to explain the rise in real yields, Warsh offered an economic growth interpretation, attributing the move to solid U.S. economic output, strong capital expenditures and steady labor markets. He also attributed this rise in real yields to a healthy market dynamic — investors responding to real economic data rather than Fed guidance.

Indeed, since rejoining the Fed, Warsh has been notable for embracing a reduced-communication approach and coined the memorable phrase at this week’s Fed meeting, “Market participants are learning to play ball, not the referee.”

But what if the rise in yields is not entirely about U.S. growth expectations? What if the Fed chair’s own communications are responsible for a meaningful portion of that move?

Specifically, Warsh appears unaware that his own statements about the Fed’s five recently formed policy review task forces may be influencing the U.S. bond market. The announcement of a task force on inflation measurement reform, in particular, may be influencing the U.S. bond market, including real yields on Treasury Inflation Protected Securities, or TIPS.

To understand this argument, it is important to understand what TIPS are. Their returns are indexed to the Consumer Price Index, specifically the urban CPI, not seasonally adjusted. Their real yields, therefore, reflect not only growth and inflation expectations, but also investor confidence in the integrity and stability of the measurement of the CPI index itself.

Both in his confirmation testimony in April and recently in announcing his new task forces, Warsh has raised questions about possible changes to the way the U.S. measures inflation. When a sitting Fed chair signals that the measurement of U.S. inflation, which underpins inflation-linked Treasuries, could potentially be subject to revision, one would anticipate that investors in those securities might take note and respond.

It seems plausible that TIPS investors may demand a risk premium to compensate for the uncertainty about what those bonds will actually pay over their lifetimes. If such a premium emerged, the price of TIPS would be expected to fall and TIPS’ real yields would rise. Also, such a risk-premium would be anticipated to impact long-dated TIPS more.

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Indeed, we already have a precedent for how inflation measurement uncertainty may rattle TIPS investors. During the 2025 government shutdown, the Bureau of Labor Statistics temporarily suspended publication of October CPI data and carried forward September 2025 prices for the October 2025 inflation indices. Missing October data also affected April 2026 rent and owner’s equivalent rent indices and impacted planned CPI weight updates. That episode, however brief, pushed real yields on very short-dated TIPS up from 2% to over 8% and may have left some lingering damage to investor confidence in the government’s measurement of inflation compensation in TIPS. A Fed chair publicly contemplating methodological changes to U.S. inflation measurement arguably is a far more consequential source of uncertainty for the valuation of all TIPS, especially longer-dated TIPS.

So perhaps we should consider an alternative reading of the strong rise in TIPS’ real yields. If some market participants believe the U.S. government could revise inflation measures in ways that lower reported CPI, TIPS breakevens would mechanically compress because the inflation component of the TIPS return would be expected to be lower. At the same time, investors would demand higher real yields on TIPS to compensate for the risk of how U.S. CPI measurement might change over the life of a 10-, 20-, or 30-year security.

In other words, relatively well-behaved TIPS inflation breakevens and rising real yields arguably are also what one might observe if investors were pricing in a risk of a possible CPI methodology change — not just strong growth and inflation returning to target.

The two narratives are similar in TIPS market outcomes, but they carry very different policy implications. One suggests the bond market reflects the economic outlook and perhaps could be viewed as implying that the Fed can afford to wait and leave policy unchanged; the other suggests the Fed has impacted the bond market and tightened U.S. financial conditions through its creation of the inflation task force with a remit that includes measurement.

While it is unlikely that all of the recent increase in TIPS’ real yields reflects an emerging risk premium around CPI measurement, it is equally unlikely that the inflation task force announcement has had no impact on TIPS’ valuation.

A similar point could also be made regarding the new Fed balance sheet task force. This second task force also may impact market expectations for reduced Fed purchases of long-dated government securities and, in turn, increase long-dated Treasury yields. A third task force on AI is anticipated to argue that possible AI productivity enhancements may merit the Fed taking a wait-and-see approach to inflation which could imply a higher Treasury term premium. A fourth task force on communication is to examine how the Fed communicates its decisions amid uncertainty. Less recurring Fed communication may contribute to greater market uncertainty, interest rate volatility and, in turn, higher U.S. interest rates. Only the fifth task force, on macroeconomic data, does not have a clear-cut bond market impact.

In sum, forward guidance remains with us. However, the forward guidance now stems from Chair Warsh’s creation of five task forces, most of which are currently interpreted as a policy direction that may contribute to higher long-term U.S. interest rates. Thus, the recent sharp rise in long-dated U.S. bond yields undoubtedly reflects more than expectations for the U.S. economy. The U.S. bond market continues to be a mirror that reflects Fed actions.