Bitcoin CPI falls 19.30% in September but rises 43.75% year over year

Samara Asset Group's index prices the standard US consumer basket in Bitcoin, and the monthly and annual readings point in opposite directions Samara Asset Group’s US Bitcoin Consumer Price Index fell 19.30% month over month in September. Over the past year, the same index rose 43.75%. What the Bitcoin CPI actually measures Picture the government’s regular inflation report, but every price tag is written in Bitcoin instead of dollars. That is the basic idea behind the index, known as BTCCPI. Samara, an asset manager based in Malta, takes the Bureau of Labor Statistics’ CPI-U basket and re-prices it in Bitcoin. CPI-U is the standard consumer price measure covering things like food, housing and transportation. The methodology mirrors the traditional CPI and keeps the basket of goods and services consistent. The difference is the unit of account. Price data comes from the Bureau of Labor Statistics, while Bitcoin prices are drawn from sources including Yahoo Finance. Like any CPI, the index tracks what that basket costs over time. When it falls, the same groceries, rent and gas cost fewer units of Bitcoin. When it rises, they cost more. A volatile track record in 2026 In April, the in...