What is CPI in Forex?

CPI (Consumer Price Index)
Forex Trading Glossary

Quick Answer: CPI tracks consumer price inflation by measuring how the cost of a basket of goods changes over time. It is the primary inflation gauge central banks use when setting interest rates, making every release a high-impact event.

What is CPI (Consumer Price Index)?

CPI is the primary measure of consumer price inflation, tracking price changes for a basket of goods and services. Central banks obsessively monitor CPI because their mandate includes maintaining price stability around 2%. Rising CPI prompts rate hikes (currency strength), while falling CPI enables rate cuts (currency weakness).

Types of CPI

  • Headline CPI: Total inflation including food/energy
  • Core CPI: Excludes volatile food/energy (Fed's preferred metric)
  • MoM: Month-over-month change
  • YoY: Year-over-year change (most referenced)

Practical Example

US Core CPI shows 0.5% MoM vs 0.3% expected. This hot inflation print signals continued Fed rate hikes. USD rallies 80+ pips as traders price in higher terminal rates.

Trading CPI Releases

  • High impact: 50-150 pip moves on surprise readings
  • Monthly release: Mid-month for prior month's data
  • Extreme volatility: First 5-15 minutes post-release
  • Wide stops needed: Slippage common

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