Traders price the May 2026 U.S. CPI annual rate near 4.2-4.3 percent with closely matched probabilities because April's 3.8 percent print already reflected sharp energy-driven gains from Middle East supply disruptions, and nowcasts plus forecaster surveys point to further modest acceleration before the June 10 release. Recent monthly gains of 0.6 percent, combined with tariff pass-through into goods prices and elevated shelter readings, support the market-implied clustering around these levels rather than a reversal toward the prior 3.3 percent pace. The narrow spread between the two leading outcomes highlights uncertainty over the precise monthly contribution from gasoline and core services, while lower-probability outcomes below 4.1 percent or above 4.4 percent would require either rapid energy price reversal or additional upside surprises in goods inflation.