Recent August CPI data showing a 0.4% monthly rise, driven largely by gasoline prices, has shaped expectations for September, with forecasters highlighting continued energy volatility and potential tariff-related pressures on goods as key variables. The closely matched market-implied odds between 0.5% and 0.6% monthly headline inflation reflect uncertainty over whether cooling core trends or reaccelerating supercore components will dominate the print. Traders are monitoring oil market dynamics, shelter costs, and labor market signals ahead of the October 14 release, as these factors could shift the balance between the leading outcomes and influence subsequent Federal Reserve policy expectations.