What is Inflation?
Inflation is the rate at which the general price level of goods and services rises over time, reducing purchasing power. Central banks target 2% annual inflation in most developed economies; rates above 4-5% trigger aggressive monetary tightening, while deflation (negative inflation) is also feared.
Definition
Inflation is measured by tracking a basket of consumer prices (Consumer Price Index, CPI) or producer prices (PPI). The two main types: demand-pull inflation (too much money chasing too few goods, typical of booming economies) and cost-push inflation (supply shocks raising input costs, as in the 2022 energy crisis). Inflation matters for currency markets because central banks set policy rates to control it — high inflation triggers rate hikes that typically strengthen the currency in the short run but reflect economic stress. Hyperinflation (50%+ monthly) destroys currencies entirely — examples include 1923 Germany, 2008 Zimbabwe, and 2018 Venezuela. The 2021-2023 global inflation spike was the first major bout of developed-economy inflation since the 1980s, driven by COVID stimulus, supply-chain disruptions, and energy shocks.
Worked example
US inflation peaked at 9.1% year-over-year in June 2022 — the highest since 1981. This forced the Federal Reserve to raise the federal funds rate from 0% (March 2022) to 5.25-5.50% (July 2023) — the fastest tightening cycle since the 1980s. USD/EUR rallied from 1.14 to 0.96 during the tightening as the Fed-ECB differential widened. By 2025 US inflation had fallen back toward 2.5%, allowing the Fed to begin cutting rates — which weakened USD against major peers.
Why it matters
For travelers and money senders, high inflation in a destination country means prices in local currency keep rising even if your home currency holds value. Conversely, your home currency's inflation rate affects how much purchasing power your savings retain — 5% annual inflation halves purchasing power in 14 years. For long-term currency direction, the central-bank policy response to inflation (rate hikes or cuts) matters more than the inflation level itself.
Live currency rates
See inflation in action with live rates.
Frequently asked questions
Why do central banks target 2% inflation?
The 2% target emerged from 1990s research suggesting a small positive inflation rate provides a "buffer" against deflation (which is harder to combat with monetary tools) while remaining low enough not to distort economic decisions. New Zealand was the first central bank to formally target 2% inflation in 1989; the Fed, ECB, BoE, and BoJ followed over the subsequent decades. Some economists argue the target should be 3-4% post-COVID to give central banks more policy room.
What's the difference between inflation and hyperinflation?
Inflation is the general term for rising prices, typically measured year-over-year. Hyperinflation is defined as 50%+ monthly inflation — meaning prices double every ~50 days. Hyperinflation destroys money's function as a store of value. Historical examples: Weimar Germany (1923, monthly inflation up to 29,500%), Zimbabwe (2008, monthly inflation up to 79.6 billion%), and Venezuela (2018, monthly inflation up to 65,000%).
Is some inflation good?
Yes — economists generally consider 1-3% inflation healthy. Moderate inflation encourages spending and investment (since holding cash loses value), provides wage-bargaining flexibility (employers can give real-wage cuts via stagnant nominal wages), and gives central banks room to cut interest rates during downturns. Deflation (negative inflation) is feared because it encourages consumers to delay purchases (waiting for lower prices) and increases the real burden of debt.
Related terms
Quantitative Easing (QE)
Quantitative easing (QE) is a monetary-policy tool where central banks buy large quantities of government bonds and other securities to inject money into the financial system, lowering long-term interest rates and stimulating lending when short-term rates are already near zero.
Safe-Haven Currency
A safe-haven currency is one that investors buy during periods of global financial stress, often regardless of fundamental factors. The Japanese Yen (JPY), Swiss Franc (CHF), and US Dollar (USD) are the primary safe havens; gold is a non-currency safe haven.
Volatility
Volatility is the measure of how much an exchange rate fluctuates over a given time period. High volatility means larger and faster price swings; low volatility means stable, range-bound trading. It is quoted as annualized standard deviation in professional markets.