The Consumer Price Index for September 2026 came in at 336.940, up 3.7% from a year earlier, with core CPI — the version that strips out food and energy — up 2.6%. That single release moved stocks, bonds, gold and Bitcoin within minutes, and it will help set the Social Security cost-of-living adjustment of 3.6% for 2027. Yet most people who hear "CPI" have only a vague idea what is...
