Consumer Price Index (CPI)

The Consumer Price Index is the most widely cited US inflation measure, published monthly by the Bureau of Labor Statistics. It tracks the average price change of a weighted basket of goods and services bought by urban consumers, from rent and food to medical care. Year-over-year CPI peaked at 9.1 percent in June 2022, the highest reading since 1981.

Why it matters

CPI is the number that defines inflation for markets, policy, and law. Social Security payments, tax brackets, TIPS bonds, and countless contracts adjust to it, and central banks are judged against it even though the Federal Reserve formally targets a related gauge, the PCE index. It is also perennially contested. Critics argue that methodology choices such as substitution adjustments, quality corrections, and the treatment of housing understate the inflation people actually experience, while defenders note that measuring one price level for millions of households is inherently approximate. Either way, small differences compound: at 3 percent measured inflation, prices double in roughly 24 years.

In the gold vs bitcoin debate

For holders of gold and bitcoin, CPI is the benchmark their assets are supposed to beat, since the case for both begins with fiat currency losing purchasing power. Gold's long-run record against CPI is positive but uneven across decades; bitcoin has outrun CPI dramatically over its short life while failing to track it year by year. Both communities also share the critique that official indexes understate monetary debasement, preferring measures like money supply growth or asset prices. Whatever its flaws, CPI remains the common denominator of the inflation debate, and every hedge is graded against it.