The Consumer Price Index (CPI) is a statistical measure that tracks changes in the prices of a basket of goods and services typically purchased by consumers. CPI serves as a primary indicator of inflation and is closely monitored by central banks, policymakers, and traders to assess economic conditions and guide monetary policy decisions.

CPI data releases significantly impact financial markets, particularly bond prices, currency values, and inflation-sensitive investments. Rising CPI suggests increasing inflation, which may prompt central banks to raise interest rates, affecting various asset classes. Traders use CPI data to position themselves ahead of potential policy changes and to trade inflation-protected securities and commodities that typically benefit from rising prices.

Real-world example: A trader purchases Treasury Inflation-Protected Securities (TIPS) before a higher-than-expected CPI release, profiting as bond yields rise and TIPS provide inflation protection.