What is Consumer Price Index (CPI)?
Definition
The Consumer Price Index measures the average change in prices paid by urban consumers for a basket of goods and services. It is the most widely reported inflation measure and a key input for monetary policy, Social Security adjustments, and financial market expectations.
Detailed Explanation
CPI is published monthly by the Bureau of Labor Statistics (BLS). It tracks prices for about 80,000 items in categories including housing (33%), food (14%), transportation (16%), medical care (9%), and recreation (6%). The percentage changes (month-over-month and year-over-year) are the headline inflation figures.
Core CPI excludes food and energy prices because they are highly volatile and can obscure underlying inflation trends. Analysts focus on both headline and core CPI, but the Fed pays more attention to core measures for policy decisions.
CPI reports are major market-moving events. Higher-than-expected CPI readings typically push bond yields higher and stock prices lower (anticipating more aggressive Fed tightening). Lower-than-expected readings have the opposite effect.
CPI has been criticized for potentially understating true inflation because it uses geometric means that account for substitution effects (consumers switching to cheaper alternatives) and quality adjustments (improvements in products that offset price increases).
Frequently Asked Questions
When is CPI released?
What is core CPI?
Does CPI accurately measure inflation?
Related Terms
Federal Funds Rate
The federal funds rate is the interest rate at which banks lend reserve balances to each other overnight, set as a target range by the Federal Reserve's FOMC. It is the most influential interest rate in the world, affecting everything from mortgage rates to stock valuations to global capital flows.
Gross Domestic Product (GDP)
Gross Domestic Product (GDP) is the total monetary value of all goods and services produced within a country's borders during a specific period. It is the broadest measure of economic activity and the primary gauge of an economy's size and health.
Unemployment Rate
The unemployment rate is the percentage of the labor force that is jobless and actively seeking employment. Published monthly by the Bureau of Labor Statistics, it is a key indicator of economic health and influences Fed monetary policy decisions.
Inflation
Inflation is the rate at which the general level of prices for goods and services rises over time, eroding purchasing power. Moderate inflation (around 2%) is considered healthy for economic growth, while high inflation can destabilize economies and financial markets.
See It in Action
Disclaimer: The information on this page is provided for educational and informational purposes only and does not constitute investment advice. AI-generated analysis may contain errors or inaccuracies. Always conduct your own research and consult a qualified financial advisor before making investment decisions.
See Consumer Price Index (CPI) in Action
StoxPulse AI automatically tracks and analyzes key financial metrics from earnings calls and SEC filings for your watchlist.