Inflation May Look Worse Than It Is

When inflation pressure is driven by a temporary oil shock and statistical quirks inside the Fed’s preferred price index, tightening policy into that mix risks solving the wrong problem on a delay—by the time higher rates bite, the shock has likely faded while the labor market wears the cost.

The Short Version

Energy spikes are classic supply shocks; monetary tightening is a blunt, lagging tool against them and can depress output more than it cools core inflation.
Federal Reserve leaders have repeatedly said they tend to “look through” short-lived supply shocks because policy acts with long lags.
Credible analysts argue core inflation gauges, especially core PCE, are temporarily overstated by how they measure portfolio services and software, exaggerating the case to hike.
The live point of contention is persistence: if energy shocks broaden and linger, second-round effects become the central bank’s problem; if not, hiking into weakness is a mistake.

What a September Hike Would Be Trying to Fix—and Why That’s Misaligned

Monetary policy can damp inflation driven by excess demand; it does less well against a negative supply shock like a jump in energy costs. Oil and refined products feed into headline inflation quickly, but the pass-through to core—prices excluding food and energy—is smaller and slower. Empirical work across the Federal Reserve System has found that gasoline shocks explain the lion’s share of headline inflation variability and only a sliver of core’s; the best estimate is that core’s response is small, statistically fragile, and stretched over time. Tightening into such a shock tends to lean harder on output and employment than on the underlying inflation impulse it cannot directly remedy.

Chair Jerome Powell captured the operational logic plainly: by the time a tightening cycle works its way through credit channels and wage-setting, an oil shock is often “long gone,” so the Fed’s tendency is to look through supply shocks unless they threaten to spill into broader, persistent price-setting behavior. In March 2026 he also underscored the uncertainty around scope and duration—headline inflation rises with energy, but whether and how much it affects activity and persistent core pressure is a live assessment, not a mechanical rule to hike on impact.

The Measurement Problem Inside Core PCE

The case against hiking now does not rely solely on shock typology; it also challenges the signal coming from the Fed’s preferred inflation gauge. Stephen Miran has argued that roughly 45 basis points of year-over-year core PCE inflation reflect portfolio management services whose imputed prices mechanically rise with equity markets rather than with out-of-pocket consumer costs. If correct, that is not demand overheating—it is index construction showing asset-price co-movements masquerading as consumer inflation. He further contends that software prices are overstated in PCE due to category mismatch and quality-adjustment artifacts, together contributing on the order of several tenths of a percent to core readings; his public estimates put the total measurement overstatement near 70 basis points, and he has pointed to pending BEA methodological revisions that, he expects, would trim reported core PCE by 20 to 40 basis points when implemented.

These are consequential claims with policy salience. They also deserve the right calibration: the record here provides Miran’s analyses and interviews, including precise bases for his numbers, but not an official BEA technical note confirming specific forthcoming adjustments or the exact magnitude of any revision. Treat them as informed, testable estimates—serious enough to weigh when deciding whether to impose tighter policy that acts with long lags, but not yet adjudicated by the agency whose methods are in question.

Energy Spikes, Policy Lags, and the Risk of Overtightening

There is no serious dispute that oil shocks raise headline inflation and sap growth. A recent Federal Reserve analysis of global oil-price shocks quantified a modest drag on U.S. GDP growth and only a small, slow-moving impact on core inflation; in other words, precisely the profile that tempts procyclical mistakes—tightening into a decelerating real economy because headline prints are noisy and elevated. The logic of “looking through” is not complacency; it is an acknowledgement that raising the policy rate cannot pump more oil, repair geopolitics, or re-route tankers. What it can do is suppress interest-sensitive sectors—housing, capital spending, small-firm credit—while the supply problem resolves on its own timetable.

Strategists like Barry Knapp translate that mechanism to the household and small-bank level: if policy is already restrictive and fiscal tailwinds are fading, adding another turn of the screw to counter a cost shock is counterproductive. He points to slowing growth in government outlays, subdued money growth, and a downshift in goods and services consumption—early signs that demand is cooling without additional tightening. That is consistent with the central-bank literature: when oil shocks are supply-driven, the optimal response is milder policy—sometimes even easing—so as not to amplify the output loss while remaining vigilant for signs of second-round effects in wages and non-energy prices.

Where the Hawks Have a Point: Persistence and Second-Round Effects

The strongest counterargument comes from the risk management side: if elevated energy prices linger and broaden, they can unmoor expectations and seed second-round inflation through wages and markups. That is why the European Central Bank, confronting a war-driven energy shock, raised rates in June and judged the decision “robust across scenarios,” including ones where oil normalizes faster; their stated aim was to head off medium-term persistence and prevent inflation from sitting above target absent additional tightening.

This is not a trivial contrast. The ECB’s posture reflects different institutional judgments about persistence, pass-through, and the credibility calculus. U.S. policymakers have voiced the same conditionality: if inflation stays elevated and broadens, further hikes remain on the table. That leaves the hinge of the current debate precisely where it should be—on evidence of persistence, breadth across core categories, and expectations, not on the first-round jump in headline prints alone.

How to Decide Well Under Uncertainty

Good policy under uncertainty focuses on the signal that maps to the instrument. Three practical guideposts follow. First, discriminate the shock: if the data show core disinflation continuing outside energy-sensitive categories and wage growth aligning with productivity plus target inflation, the case to “look through” is strong; a hike would add unemployment risk without commensurate inflation benefit. Second, clean the gauge: adjudicate the measurement claims quickly—on portfolio services and software—so the PCE signal reflects consumer price pressure rather than asset-market co-movement or category noise. Even Miran’s lower-end revision range, if validated, would materially alter the real-time read of core momentum. Third, watch expectations and breadth: if survey- and market-based inflation expectations remain anchored and core breadth narrows, restraint is warranted; if breadth and expectations turn, the case to tighten hardens.

Bottom Line

Hiking into a supply shock and a potentially overstated core PCE risks trading a statistical mirage and a temporary relative-price change for real job losses months later. The right posture is conditional patience: keep policy restrictive, intensify surveillance for genuine persistence and second-round effects, and resolve the measurement questions that may be inflating the very gauge officials watch most closely. When your instrument works on a lag, aim at the underlying process, not the noise around it.