Nomura: BEA technical adjustments may further depress US core PCE inflation

Overview

This report discusses the sources of the “technical” decline in US core PCE inflation. Nomura believes that the BEA's adjustments to the statistical methodologies for several PCE price components will create additional downward pressure on core PCE at the data level. The report also notes that while these adjustments are technically reasonable when considered individually, their timing and cumulative impact during a period of high inflation and policy sensitivity could raise concerns about political influence over statistical methodologies.

Core views

The core views include: First, the BEA is about to adjust three PCE components—computer software and accessories, portfolio management and investment advice services, and legal services—which are expected to reduce year-over-year core PCE inflation by approximately 20bp in aggregate. Second, a definitional mismatch in the computer software and accessories component had previously amplified the impact of rising flash memory prices on PCE software inflation; the new composite index could reduce inflation in this component from 14.5% to approximately 8%, corresponding to about -8bp for core PCE. Third, the portfolio management and investment advice services component will shift from a direct price index to an implicit price index, which is expected to reduce its year-over-year growth rate from 21.6% to 14%, corresponding to approximately -14bp for core PCE. Fourth, the legal services component may be revised upward, with an estimated contribution of approximately +3bp to core PCE, although volatility will decline. Fifth, beyond the methodological adjustments, fading tariff effects, falling oil prices, slower wage growth, and seasonal factors all point to a moderate decline in core PCE in the second half of the year.

Analysis framework

The report is structured around a decomposition of contributions from PCE components. It compares the current methodologies with the new methodologies proposed by the BEA and estimates the marginal impact of each component on year-over-year core PCE and supercore PCE. It also assesses inflation momentum in the second half of the year using indicators including tariffs, import prices, crude oil and jet fuel prices, wage-sensitive services prices, residual seasonality, and electronic component prices.

Methodology notes

• Inflation accountingPCE price index methodological adjustments

  The BEA will adjust the estimation methodologies for selected PCE price components in the annual GDP revision.

  The report focuses on computer software and accessories, portfolio management and investment advice services, and legal services. The new methodologies will be applied retrospectively to PCE price data since January 2021, while legal services may be revised retrospectively to January 2024.

• Component contribution decompositionCore PCE contribution analysis

  The contribution of each component to core PCE in basis points is estimated using its weight and year-over-year change rate.

  As of May 2026, the three components proposed for adjustment together contributed approximately 60bp to year-over-year core PCE inflation. Portfolio management and investment advice services contributed approximately 40bp and were the most important component.

• Policy transmissionInflation forecasts and Federal Reserve policy implications

  Changes in inflation forecasts alter the distribution of risks surrounding the policy path.

  Nomura lowered its fourth-quarter 2026 year-over-year core PCE forecast from 3.3% to 3.1% and expects it to decline further to 2.4% in the fourth quarter of 2027. It therefore believes that the hawkish risk facing its view that the Federal Reserve will not cut rates or adjust its policy rate through 2027 has declined.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• US interest rates

  A decline in core PCE would reduce hawkish risks to the policy path.

  Strengths

  If inflation cools as forecast in the report, upward pressure on long-term rates may ease.

  Weaknesses

  Nomura still expects the Federal Reserve to remain on hold, so short-term rates may not decline rapidly.

  Comparison

  Compared with CPI, PCE methodological adjustments have a more direct impact on the inflation measure preferred by the Federal Reserve.

  Risks

  AI-related supply shocks, rising semiconductor prices, or geopolitical risks could push goods inflation higher again.

• Dollar macro outlook

  Cooling inflation could weaken market pricing for further hawkish policy.

  Strengths

  A downward revision to the core PCE forecast supports an easing of policy risks.

  Weaknesses

  If the Federal Reserve remains on hold for an extended period, interest-rate differential support may persist.

  Comparison

  The dollar impact depends on the pace of the decline in US inflation relative to changes in the policy paths of other economies.

  Risks

  Disputes over the data methodology could increase the discount applied to the credibility of inflation data and policy communication uncertainty.

• Crude oil and energy-sensitive consumption components

  Falling crude oil prices affect PCE through energy-sensitive components such as jet fuel and airfares.

  Strengths

  Oil prices returning to pre-US-Iran conflict levels could partially reverse related price increases from the past several months.

  Weaknesses

  Transmission is subject to lags, and energy prices themselves are highly volatile.

  Comparison

  Compared with methodological adjustments, the impact of oil prices is more cyclical and market-price-driven.

  Risks

  Geopolitical conflicts or weather shocks could push energy prices higher again.

Key data

• Estimated net impact of methodological adjustments on core PCEApproximately -20bpAggregate estimate from the BEA's methodological adjustments to the three PCE price components.
• Contribution of the three components to core PCE as of May 2026Approximately 60bpIncludes computer software and accessories, portfolio management and investment advice services, and legal services.
• Impact of the computer software and accessories componentApproximately -8bpThe new composite index could reduce the component's year-over-year growth rate from 14.5% to approximately 8%.
• Impact of the portfolio management and investment advice services componentApproximately -14bpThe new methodology could reduce the component's year-over-year growth rate from 21.6% to 14%.
• Impact of the legal services componentApproximately +3bpAssuming equal weighting of the relevant PPI legal services components, legal services PCE inflation could be revised upward from 2.5% to approximately 6.5%.
• Peak impact of tariffs on core PCEApproximately 0.4-0.5 percentage pointsThe report states that the tariff impact has peaked and is now reversing.
• Nomura's fourth-quarter 2026 core PCE forecast3.1%Down 0.2 percentage points from the previous forecast of 3.3%.
• Nomura's fourth-quarter 2027 core PCE forecast2.4%Expected to continue declining moderately in 2027.

Impact & implications

The report's main market implication is that US inflation data may decline due to the combined effects of methodological adjustments and fundamental factors, reducing the risk that an upside inflation surprise would force the Federal Reserve to adopt a more hawkish stance. However, the report does not believe this is sufficient to trigger a near-term policy shift; Nomura still expects the Federal Reserve to keep its policy rate unchanged for an extended period. Politically, the lower threshold for adjusting PCE methodologies than CPI methodologies may intensify market attention to narratives about government influence over inflation data and expectations for Federal Reserve policy.

Risks

• Although the methodological adjustments have technical justification, their timing and cumulative impact could raise concerns about political influence over statistical methodologies.
• The AI capital-spending boom, semiconductor shortages, and planned price increases could push up prices for electronic components and related consumer electronics.
• In the post-pandemic era, goods-price inflation may be more sensitive to supply shocks, while extreme weather or geopolitical risks could make goods inflation more persistent.
• The portfolio management and investment advice services component may be revised more frequently under the new methodology, increasing uncertainty around initial estimates.
• If CPI estimation methodologies are also adjusted in the future, market attention to the continuity and comparability of official inflation data could increase.

What to watch

• The September 30 annual BEA GDP revision and the actual scale of the new methodology's implementation for PCE price components.
• Whether monthly momentum in core PCE and supercore PCE slows as expected in the second half of 2026.
• The revision paths for computer software and accessories, portfolio management and investment advice services, and legal services.
• Whether tariff effects continue to fade and whether the divergence between core PCE goods inflation and import prices narrows.
• The lagged transmission of crude oil, jet fuel, and airfares into PCE energy-sensitive components.
• Trends in wage growth and wage-sensitive services prices, including food services and lodging.
• Whether electronic components, memory chips, and consumer electronics prices show more pronounced pass-through.
• Federal Reserve officials' comments on the PCE methodological adjustments, falling inflation, and the policy-rate path.