Macro & Central BanksCPIHeadline Inflation
Consumer Price Index (CPI)
A statistical measure of the average change in prices paid by households for a fixed basket of goods and services.
What Consumer Price Index (CPI) means
The Consumer Price Index tracks the average change over time in the prices households pay for a representative basket of goods and services, covering categories such as housing, food, energy, transport, medical care and recreation. In the United States it is compiled and published monthly by the Bureau of Labor Statistics. Headline CPI includes everything in the basket, while core CPI strips out food and energy because those two components are volatile and often driven by weather or geopolitics rather than by underlying demand. Most releases are quoted both month-on-month and year-on-year.
CPI is the most direct read on inflation available to traders, and inflation is what most central banks are mandated to control. An inflation print above expectations raises the odds of tighter policy and higher yields, which typically lifts the currency; a soft print does the reverse. Currencies therefore react to CPI surprises far more than to the level of inflation itself. Note that basket weights are updated periodically, seasonal adjustment can distort a single month, and some central banks target a different gauge entirely, so CPI is an important input rather than the whole picture.
Worked example
Suppose euro-area CPI is expected at 3.0 percent year-on-year and prints at 3.4 percent, with core also firmer. Markets would price a slower path of rate cuts, and EUR/USD could rally from around 1.0850 toward 1.0920 as short-dated yields rise. Illustrative only.
Related terms
- InflationA sustained increase in the general price level, which erodes the purchasing power of a currency over time.
- Producer Price Index (PPI)A measure of the average change in selling prices received by domestic producers for their output.
- Interest RateThe price of borrowing money, expressed as a percentage per year, with the central bank's policy rate anchoring the whole structure.
- Federal ReserveThe central bank of the United States, responsible for US monetary policy and the world's primary reserve currency.
- Economic CalendarA schedule of upcoming data releases, central bank events and speeches, with forecast and prior figures and an importance rating.
Frequently asked questions
What does Consumer Price Index (CPI) mean in forex trading?
A statistical measure of the average change in prices paid by households for a fixed basket of goods and services.
How does Consumer Price Index (CPI) work in practice?
CPI is the most direct read on inflation available to traders, and inflation is what most central banks are mandated to control. An inflation print above expectations raises the odds of tighter policy and higher yields, which typically lifts the currency; a soft print does the reverse. Currencies therefore react to CPI surprises far more than to the level of inflation itself. Note that basket weights are updated periodically, seasonal adjustment can distort a single month, and some central banks target a different gauge entirely, so CPI is an important input rather than the whole picture.
What is an example of Consumer Price Index (CPI)?
Suppose euro-area CPI is expected at 3.0 percent year-on-year and prints at 3.4 percent, with core also firmer. Markets would price a slower path of rate cuts, and EUR/USD could rally from around 1.0850 toward 1.0920 as short-dated yields rise. Illustrative only.
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