VAN R. HOISINGTON AND LACY H. HUNT: Inflation is not mean reverting; it takes an active, credible regime, and the Fed's 2021-22 delay is why inflation has stayed above 2% for 66 months

The Gist

Hoisington and Hunt say inflation does not just fade away. Volcker beat it by changing how the Fed worked in 1979. The Powell Fed waited a year after inflation broke 2 percent, and inflation has stayed above 2 percent ever since. This is a steelman: Van R. Hoisington and Lacy H. Hunt's arguments are reconstructed in their strongest fair form, not endorsed.

Conclusion

Inflation does not reliably fall back to target on its own; it takes an active, credible monetary regime, and the Fed's delayed response in 2021 and 2022 is why inflation has stayed above 2 percent for 66 straight months.

Premises

1. In 1979 incremental rate hikes were seen as inadequate, so on October 6, 1979 the Fed overhauled its procedures to control bank reserves and money growth.
2. PCE inflation rose above 2 percent in March 2021, but the Fed waited until March 2022 to raise rates; when it did, PCE inflation was about 6.1 percent and the funds rate was 0 to 0.25 percent.
3. At the 2021 breach broad money was growing about 24 percent, about 20 points above a 4 percent benchmark, and in January 2022 it was still up 11.7 percent, nearly 8 points above; velocity turned up in late 2021, adding to spending.
4. Inflation has stayed above 2 percent for 66 straight months, reaching 3.4 percent in August 2026.
5. Research finds that poorly anchored expectations make shocks more persistent (Tetlow 2018; IMF), that inflation became more inertial in major economies after the pandemic (a 2024 Fed study), that short-term household expectations had persistent nonlinear effects on trend inflation (Bank of England), and that short-term expectations feed pricing and wage decisions (Hajdini et al. 2025; Abberger et al. 2024).

Assumptions

• Institutional credibility, not elapsed time, is what returns inflation to target.
• Financial interest: Hoisington Investment Management manages U.S. Treasury portfolios and for decades was known for holding very long-duration Treasuries on a falling-inflation, falling-rates view. Press reports on its 2026 letters say the firm cut effective duration from about 20.9 years at the end of September 2025 to under one year by June 30, 2026, so this letter's forecast of higher long-term yields is consistent with the firm's current short-duration positioning rather than with its earlier long-duration stance. Sources: "Decades long bull turns bearish. Cites structural deficits…
• Differs: Current BEA data put PCE inflation at about 6.5 percent in February 2022 and 6.9 percent in March 2022, above the letter's 6.1 percent (more than triple the target).
• Differs: The same studies (Hajdini et al.; the Bank of England paper) find long-term expectations stayed anchored and helped inflation fall in 2023 and 2024, which tempers the "not mean reverting" framing; Michigan's 5-year expectation has, however, risen to 3.5 percent in October 2026.

Analysis

Argument type: Inductive.

Potential Fallacies

• Post hoc ergo propter hoc / single-cause attribution (Conclusion; inference from P2-P4) — A one-year delay in 2021-22 is followed by persistently above-target inflation, and the sequence is treated as the explanation for a streak running to 2026. This ignores concurrent and later drivers: fiscal stimulus, supply chains, energy shocks, shelter and services stickiness, and tariffs. It also never shows what would have happened had the Fed hiked earlier. The delay is a plausible contributor, but 'is why' claims more than the evidence supports.
• Overgeneralization / hasty generalization (Title and conclusion; P1, P5) — A law-like claim that inflation is 'not mean reverting' is built on one historical regime change (1979) and one recent episode. The cited research shows that persistence is conditional on expectations. It also shows inflation falling from about 7% to about 3% with long-term expectations anchored. The evidence supports 'slow and conditional reversion,' not the absence of reversion.
• Selective use of evidence (P5) — The persistence findings in the cited studies are foregrounded, while the same studies' finding that long-term expectations stayed anchored and aided disinflation (A4) is left out. This makes the literature seem to support the headline more fully than it does.
• Weak or incomplete analogy (P1) — The 1979 shift followed a decade of entrenched double-digit inflation and unanchored expectations. It also involved a deep recession, and reserve targeting was abandoned by about 1982. Mapping it onto a 3-4% inflation environment with largely anchored long-term expectations glosses over these differences, and the episode does not isolate credibility from sheer tightness.
• Hindsight bias (P2, P3) — The 2021 decision is judged by outcomes and money-growth data now fully known. In real time, the 'transitory' supply-shock reading was widely held, and the Fed's 2020 averaging framework tolerated overshoots. Fair evaluation weighs what was knowable then.
• Threshold fixation / arbitrary benchmark (P3, P4) — Counting months above a bright-line 2% treats a 2.1% reading and a 7% reading alike and hides the large decline from the peak. Similarly, the 'excess' money growth of 20 or 8 points depends on a 4% benchmark that is asserted rather than justified.
• Unfalsifiable framing of credibility (A1; conclusion) — If inflation falls, credibility is said to have worked; if it stays near 3%, credibility is said to be lacking. With no credibility metric stated in advance, the thesis can accommodate either outcome, which weakens its explanatory force.

Counterarguments

These challenges are not ranked.

• Conclusion (High impact) — The 2021-22 surge was largely a global shock (supply disruptions, energy and food prices, fiscal transfers) seen across countries with different central bank timing. Inflation then fell substantially without a Volcker-style regime change or recession, with long-term expectations anchored. That is mean reversion with a long lag. The current 3-3.5% is better explained by sector-specific factors such as tariffs, shelter and services than by a one-year delay four to five years earlier.
• Conclusion (High impact) — No counterfactual shows that an earlier hike would have kept inflation near 2%. Hiking into what looked like a supply shock could have caused a recession with little effect on supply-driven prices, and the Fed's 'transitory' call was shared by many forecasters. The soft landing weakens the case that the response was a failure.
• Premise 3 (Medium impact) — The money-inflation relationship is unstable, which is why the Fed abandoned monetary targeting in the 1980s. The 4% benchmark is arbitrary, and money growth was itself a product of fiscal deficits financed through QE, so it cannot be separated from the fiscal channel. M2 contracted in 2022-23 while inflation declined only gradually.
• Premise 1 (Medium impact) — Volcker's disinflation owed much to very high real rates and a severe recession, not to the procedural switch to reserve targeting, which was dropped by 1982. The 1970s starting point of double-digit inflation and unanchored expectations differs sharply from 2021-26, and many inflation episodes have reverted without any regime change.
• Premise 5 (High impact) — The same studies the argument cites find that long-term expectations stayed anchored and helped disinflation in 2023-24, implying Fed credibility was largely intact. Persistence therefore came from other channels. The recent rise in the Michigan 5-year measure to 3.5% is a single noisy survey series and says little about 2021-22.
• Premise 4 (Medium impact) — A 66-month streak above a bright-line 2% hides the fall from about 7% to about 3%, and the Fed's 2020 framework treated 2% as a symmetric average target that tolerated overshoots. The streak is consistent with a slow, shock-driven decay and with new post-2022 shocks, rather than with failed reversion.
• Assumption A2 (Low impact) — The firm's move from ultra-long duration to under one year gives it a stake in an inflation-persistence narrative, so evidence selection may be motivated. This bears on weight, not truth, and it is double-edged, since the current view reverses the firm's prior stance.

Suggested Improvements

• Causal identification — Provide counterfactual or model-based estimates of the inflation path under earlier tightening, decompose post-2021 inflation into supply, fiscal, monetary and expectations components, and compare central banks that moved earlier with those that moved later. The 'is why' claim needs evidence that the delay, rather than concurrent shocks, accounts for the streak. This is the argument's weakest link.
• Calibrate the headline claim — Replace 'not mean reverting' with something like 'slow and conditional on credible policy,' and soften 'is why' to 'was a major contributing factor.' The evidence, including the cited studies, supports conditional persistence and a substantial but incomplete role for the delay. The softer wording matches the conclusion's own 'does not reliably' phrasing.
• Engage the full findings of the cited research — Acknowledge that long-term expectations stayed anchored through 2023-24 and explain why this is compatible with a credibility-based account, for example by treating the Michigan 3.5% reading as an early warning of de-anchoring. Addressing the counter-evidence head-on would remove the appearance of selective citation and make the thesis more robust.
• Operationalize credibility and the benchmark — State in advance which measure of credibility (market breakevens, SPF, Michigan, NY Fed) and which money-growth benchmark would count as supporting or refuting the thesis, and justify the 4% figure. This makes A1 testable instead of compatible with any outcome, and shows the money-growth gap is not an arbitrary choice.
• Real-time context and rival explanations — Discuss the 2020 averaging framework, the real-time 'transitory' case, fiscal stimulus, supply shocks, tariffs, and the costs of earlier tightening, then show why delay still dominates. Judging the 2021 decision on information available then is fairer, and engaging rival explanations strengthens the claim.
• Report magnitude and trajectory — Pair the 66-month count with the level and slope of inflation, for example showing the decline from the peak and the size of the current overshoot. A bright-line count hides how far inflation moved and invites the charge of threshold fixation.

Scenario Tests

• Inflation drifts back to about 2% by 2027 with no change in the policy regime. (Challenges) — This would show that the 66-month run was a slow transition rather than failed mean reversion, and it would undermine the predictive content of the 'not mean reverting' claim.
• Long-term inflation expectations (for example the Michigan 5-year measure at 3.5% and market breakevens) keep rising and inflation re-accelerates. (Supports) — This would indicate that credibility is eroding and that persistence is becoming self-reinforcing, giving real support to the credibility thesis, though not to the specific attribution to the 2021-22 delay.
• Cross-country comparison finds that central banks that tightened earlier still experienced similar persistence. (Challenges) — This would indicate that timing was not decisive and that common global shocks or fiscal factors dominated, weakening the causal link from the delay to the streak.
• Decomposition shows the 2025-26 readings are driven mainly by tariffs, energy and shelter components. (Challenges) — Monetary credibility would not be the binding constraint, and the 2021-22 delay would be a minor factor in the current 3.4%. The 66-month count would merge different causal regimes.
• A re-run of 1970s-style stop-go policy, where half-hearted tightening lets inflation embed and then requires a harsher later correction. (Supports) — This is consistent with the argument's core insight that delayed or timid responses entrench inflation. It supports the general lesson about credibility, though contexts differ.
• Out-of-sample tests show M2 growth and velocity did not forecast post-2020 inflation better than alternative predictors. (Challenges) — The monetarist transmission in P3 would become non-probative, leaving the case dependent on the timing and expectations arguments.

Coherence & Relevance

The argument tells a coherent story: a regime-change precedent, a late policy response, an excess money surge, persistent inflation, and a research-backed expectations mechanism. The premises are factually reliable and mutually consistent. The gap lies between these premises and the strong conclusion. The premises show that the Fed was late, that money growth was high, and that inflation has been persistent. They do not show that the delay, rather than other shocks, produced 66 months above target, and they do not reconcile the 'not mean reverting' claim with the substantial 2023-24 disinflation under anchored long-term expectations. A1 supplies the missing theory but not the evidence that credibility was lost. The weaker claim, that late and insufficiently credible action raises the risk of persistence, is well supported. The stronger claims, that inflation never reverts on its own and that the delay is the reason for the streak, are not.

• In 1979 incremental rate hikes were seen as inadequate, so on October 6, 1979 the Fed overhauled its procedures to control bank reserves and money growth. (Moderate) — It illustrates the idea of an active regime shift but is a single case, and it does not separate credibility from sheer tightness and recession. The analogy to a 3-4% inflation environment is not defended.
• PCE inflation rose above 2 percent in March 2021, but the Fed waited until March 2022 to raise rates; when it did, PCE inflation was about 6.1 percent and the funds rate was 0 to 0.25 percent. (Strong) — It directly establishes the delay. It does not link the delay to outcomes four to five years later, and it omits the real-time uncertainty and the framework that allowed overshoots.
• At the 2021 breach broad money was growing about 24 percent, about 20 points above a 4 percent benchmark, and in January 2022 it was still up 11.7 percent, nearly 8 points above; velocity turned up in late 2021, adding to spending. (Moderate) — It provides a plausible mechanism for the initial surge, but the benchmark is unjustified. Money growth cannot be separated from fiscal drivers, and the later contraction in money growth is not reconciled with continued above-target inflation.
• Inflation has stayed above 2 percent for 66 straight months, reaching 3.4 percent in August 2026. (Moderate) — This is the outcome to be explained, not evidence of cause. It is equally consistent with new post-2022 shocks or slow decay, and the threshold metric obscures magnitude and trend.
• Research finds that poorly anchored expectations make shocks more persistent (Tetlow 2018; IMF), that inflation became more inertial in major economies after the pandemic (a 2024 Fed study), that short-term household expectations had persistent nonlinear effects on trend inflation (Bank of England), and that short-term expectations feed pricing and wage decisions (Hajdini et al. 2025; Abberger et al. 2024). (Moderate) — It supports the general expectations-persistence mechanism, but it does not show that expectations became unanchored in 2021-22 or that the delay caused it. The same studies…

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