CPI month-over-month in Mar 2026?

The Cleveland Fed's Inflation Nowcasting tool, updated on March 24, 2026, projects a March CPI month-over-month increase of only 0.62% to 0.76%, significantly below the 1.0% threshold. While energy prices spiked mid-month, the most recent data from March 25, 2026, shows a sharp 5.72% reversal in gasoline futures to $2.97 per gallon as ceasefire negotiations between the U.S. and Iran progressed. This late-month collapse in energy costs will weigh heavily on the monthly average used by the BLS, likely pulling the final print toward the 0.7% to 0.8% range. Shelter inflation, which accounts for over 35% of the CPI basket, remains a significant downward anchor. The February 2026 report showed shelter rising only 0.2%, and analysts at Stephens Inc. noted on March 11, 2026, that ongoing data collection delays from previous government shutdowns are likely to result in continued underestimation of housing costs in the March release. With core inflation holding steady at 0.2% in February, the headline figure would require an unprecedented and sustained energy contribution to reach the 1.0% mark. Historical data shows that 'exactly 1.0%' is an extremely rare print even during periods of high volatility. In the last 40 years, the BLS has reported a 1.0% MoM figure only twice, both in 1980. Even during the 2022 inflation surge, prints tended to jump from 0.6% to 1.2% or 1.3%, often skipping the 1.0% decimal entirely. The statistical probability of the final rounded figure landing precisely on 1.0 in a month defined by a massive mid-month spike followed by a late-month crash is exceptionally low.

The military conflict between the U.S., Israel, and Iran that began on February 28, 2026, triggered what the Cleveland Fed described on March 24 as the largest energy supply chain disruption in history. Nationwide average gasoline prices jumped 33% between late February and March 19, 2026, reaching their highest levels since July 2022. If the BLS sampling period, which typically focuses on the first three weeks of the month, captured this peak before the March 25 price collapse, the energy component alone could contribute over 1.1 percentage points to the headline MoM figure. Secondary effects of the conflict are already filtering into other CPI components. Source 1.17 reports that fuel oil prices surged 11.1% in February in anticipation of the war, and transportation costs for final goods are expected to rise sharply in the March data. If food prices, which rose 0.4% in February, see a similar conflict-driven acceleration due to fertilizer supply disruptions, the combined pressure from energy and food could easily push the total MoM print to 1.0% or higher. Mathematical projections based on year-over-year targets also point toward a 1.0% print. The Cleveland Fed's March 24 update projects YoY inflation to surge to 3.02% from February's 2.43%. Given that the month being dropped from the 12-month calculation (March 2025) saw a 0.4% increase, a 3.02% YoY reading mathematically implies a March 2026 MoM print of approximately 0.99%, which rounds exactly to 1.0% in the official BLS release.