Recent gasoline price surges are the dominant driver of trader positioning in the September US CPI month-over-month market, with forecasts centering on a 0.5–0.6% headline print as energy contributes the bulk of the increase while core components moderate. August’s 0.4% headline and 0.3% core readings set a high base, and September’s energy spike—projected near 5–10% seasonally adjusted—pushes the consensus higher, though steady rents, softer used-vehicle prices, and subdued insurance costs are expected to limit core gains to around 0.2%. Recent consumer surveys show one-year inflation expectations rising to 3.9%, reflecting persistent services pressures, while the labor market’s cooling trend supports views that underlying momentum is contained. With 0.5% and 0.6% outcomes separated by just a few percentage points in implied probability, resolution hinges on the precise gasoline contribution and any rounding effects in the October 14 release.