Consumer Price IndexView Financial Glossary Index
The Consumer Price Index is a statistic calculated by the Bureau of Labor Statistics that is meant to capture "cost of living" for citizens of the United States by measuring changes in purchasing power. It is released monthly, usually 2-3 after the end of the reporting period.
More specifically, CPI measures changes in the cost of a fixed basket of services and products over time. It is published monthly and sometimes referred to as the cost-of-living index.