Gasoline's 9.1% monthly rise signals inflation pressure captured in the report.
Context
What happened: The Consumer Price Index rose 0.6% in September, and the gasoline index accounted for more than half of that monthly increase.
Key numbers: CPI up 0.6% in September. Gasoline rose 9.1% in a month.
Why it matters: Gasoline drove more than half of the monthly CPI increase, making energy a dominant factor in the September inflation reading.