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宏观5月12日 · Morgan Stanley

April CPI: Rents and oil push, softer tariff push

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April CPI: Rents and oil push, softer tariff push

Core Conclusions

April core CPI rose 0.38% m/m (MS: 0.36%, consensus: 0.3%), driven by a technical rent spike and continued oil pass-through to airfares, but tariff effects are fading. The month’s data confirm the tariff impulse is nearing its end (cumulative ~64bp vs. model total ~70bp), rent acceleration is a BLS calculation anomaly, and oil spillover remains confined to airfares. Core disinflation should resume in coming months—market fears of sustained reacceleration are overdone. The Fed stays on hold, but the window for rate cuts later in 2026 remains open.

Tariff Pass-Through Is Approaching the Finish Line

Tariffs have lifted the core PCE price level by roughly 64bp to date, close to the estimated total effect of ~70bp. Core goods CPI rose only 0.03% m/m in April, down from 0.11% in March. New vehicles fell 0.16% m/m, and “other core goods” declined 0.11% m/m, suggesting tariff-driven pricing is decelerating. The implication: core goods inflation will normalize over the next few months, removing a key upside risk to the near-term inflation outlook.

April Rent Spike Is a Statistical Artifact, Not the Start of a Trend

Owners’ equivalent rent (OER) jumped to +0.53% m/m (from +0.28%) and rent of primary residence to +0.55% (from +0.19%). The Bureau of Labor Statistics changed its calculation in April, using the 1/6th root of effectively a 12-month change instead of the usual 6-month change. This one-off methodological shift artificially boosted the month. The base effect will reverse in subsequent months, and the underlying trend remains decelerating. Investors should not extrapolate the April rent print into a new cycle acceleration.

Oil Spillover to Core Inflation Remains Narrow

Headline energy was up 3.81% m/m, keeping headline CPI well above core. But within core, only airfares showed clear acceleration (2.82% m/m, second consecutive positive reading). Core services ex-housing rose just 0.45% m/m, with no unusual pickup in transportation services other than airfares or in recreation and food services. The implication: oil’s pass-through to core is limited to a few components and does not threaten broad-based service inflation—unless oil prices rise further and spill into freight, lodging, or auto insurance.

Healthcare Services Surprise Weakens the Sticky-Service Narrative

Medical services inflation was flat (0.00% m/m) in April, after +0.01% in March and +0.61% in February. Health insurance moved from an average -1.4% m/m over Oct-25/Mar-26 to only -0.4% m/m—far below the expected reset to 0%. This component had been flagged as a potential upside driver; its softness suggests service inflation is less entrenched than many believe. Core PCE services ex-housing is now forecast at 0.16% m/m for April, a downward revision from pre-CPI estimates.

Core PCE Forecast Revised Up but Trend Disinflation Intact

Following the CPI data, the April core PCE forecast was raised from 0.22% to 0.26% m/m. On a year-over-year basis, core PCE stands at 3.28%, with six- and three-month annualized rates at 3.75% and 3.76% respectively. The elevated near-term pace reflects legacy tariff and rent spikes, not new momentum. Once the tariff impulse ends and rents normalize, core PCE should decelerate towards 3% or lower. The Fed, focused on trend rather than one-month blips, will likely keep rates unchanged at the next meeting.

Key Risks

  • Oil escalation: Further oil price increases could broaden spillovers into freight, hotels, and auto insurance, making core services sticky.
  • Rent persistence: If labor market tightness or housing supply constraints keep rent inflation above 0.4% m/m beyond the technical reversal, the disinflation timeline lengthens.
  • Tariff re-escalation: New trade actions would disrupt the core goods normalization trajectory, pushing cumulative pass-through above the estimated 70bp ceiling.

Trading Implications

If core inflation resumes its descent (rent normalizes, tariff effects fade) the market will reprice a higher probability of Fed rate cuts in H2 2026. The yield curve would steepen, and short-duration Treasuries gain relative value. If oil risk materializes, the Fed will stay hawkish longer, flattening the curve and pressuring risk assets. The base case favors positioning for a steeper curve as disinflation data emerge over the next two months.