What Affects the Exchange Rate? 5 Factors That Move Currency Prices
Explained · 2026-07-16 · 4 min read
Open a currency converter on two different days and the conversion rate is almost never exactly the same. Exchange rates move constantly. Here are the five biggest reasons why, explained without the jargon.
USD → JPY live mid-market rate
1. Interest rates
When a country’s central bank raises interest rates, money tends to flow toward that currency chasing better returns, pushing its value up. Rate decisions from the US Federal Reserve, the ECB, or the Bank of England are some of the biggest single movers of exchange rates.
2. Inflation
Higher inflation erodes a currency’s purchasing power, which usually weakens it against currencies with more stable prices. Persistent inflation differences between two countries are a long-term driver of their exchange rate.
3. Economic data and growth
Strong jobs numbers, GDP growth, or trade data tend to support a currency, while weak data drags it down. Markets are constantly repricing currencies based on the latest economic picture.
4. Political stability and risk sentiment
Currencies from politically stable countries are generally seen as safer to hold. Elections, policy shifts, or geopolitical tension can cause rapid swings as investors move money toward or away from perceived risk.
5. Supply, demand, and trade flows
A country that exports far more than it imports tends to see steady demand for its currency, because buyers need it to pay for goods. That can support its value over time, and the reverse holds for import-heavy economies.
Why this matters for you
You do not need to track all five factors. But knowing that rates move for real reasons, and not randomly, explains why the conversion rate you see today may differ tomorrow. It is also why checking a live mid-market rate before converting or sending money always beats using an old number from memory.
Check today’s live conversion rate