Recent U.S. CPI data show headline inflation reaccelerating to 3.7% year-over-year in September 2026, up from 3.4% in August, with energy prices—particularly gasoline—accounting for much of the monthly rise amid geopolitical pressures. Core CPI held near 2.6%, supported by persistent shelter costs at 4.8% but tempered by softer super-core services. The Federal Reserve held its federal funds rate target at 3.75-4.00% in late October while noting elevated inflation, with markets pricing a high probability of additional tightening at the December FOMC meeting. Traders are monitoring the November 10 CPI release and year-end data for signs of whether headline readings peak above 4% before moderating, consistent with Fed projections of 2026 PCE inflation near 3.7%.