📊 Consumer Price Index (CPI)

To: Institutional Clients

From: Global Economics Strategy Team

Date: April 2026

Subject: US Inflation Update: Energy Shock Masks Core Stability

1. Executive Summary

The March 2026 CPI print reveals a stark divergence between headline volatility and underlying price stability. While the headline index surged to a 3.28% year-over-year (YoY) increase, this move was almost exclusively driven by a massive, idiosyncratic spike in energy and transportation costs. The data suggests a "cost-push" shock rather than a demand-driven inflationary spiral.

For the Federal Reserve, the signal is mixed but leans toward patience. The stability of Core CPI suggests that the restrictive policy stance is working on the broader economy, but the magnitude of the energy shock creates a significant headwind for real household income and a potential risk to headline inflation expectations.

2. Five Main Views

• Headline Acceleration Driven by Volatility: Headline CPI rose 0.86% month-on-month (MoM) in March, bringing the YoY rate to 3.28%, a significant acceleration from the trend seen in late 2025.
• Extreme Energy Shock: The primary driver was the Energy index, which exploded by 10.87% MoM in March (from 283.223 to 314.019), resulting in a staggering 12.59% YoY increase.
• Core Inflation Remains Anchored: Core CPI (ex-Food & Energy) remains well-behaved, rising only 0.20% MoM and 2.60% YoY, indicating that underlying inflationary pressures are cooling.
• Shelter Persistence: Shelter continues to provide a stubborn floor to inflation, rising 0.27% MoM and 3.02% YoY, confirming that housing costs remain a primary hurdle to reaching the 2% target.
• Transportation Correlation: The Transportation index mirrored the energy spike, jumping 4.28% MoM in March, highlighting the direct pass-through of fuel costs to logistics and consumer transit.

3. Macro Characterization

(i) Growth: The sharp increase in energy and transportation costs acts as a regressive tax on consumers, likely compressing discretionary spending. Given the 10.87% MoM jump in energy, we expect a drag on real GDP growth in Q2 2026 as higher input costs squeeze corporate margins and reduce household purchasing power.

(ii) Labor Market: While the CPI data does not directly measure employment, the stability of Core CPI (2.60% YoY) suggests that the "wage-price spiral" has largely decoupled. The lack of broad-based price acceleration in non-energy sectors indicates that labor market tightness is no longer translating into aggressive pricing power for firms.

(iii) Inflation: The current regime is characterized by "Bifurcated Inflation." We see a clear split between volatile components (Energy +12.59% YoY) and