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Every time you travel abroad, buy something from an overseas retailer, or send money to family in another country, you encounter exchange rates. These rates determine how much one currency is worth in terms of another, and they shift constantly. Understanding why rates move helps you time conversions, avoid hidden fees, and make smarter financial decisions. Use our Currency Converter to check live mid-market rates before your next transaction.
An exchange rate is simply the price of one currency expressed in another. When you see "USD/EUR = 0.92," it means one U.S. dollar buys 0.92 euros. Rates are quoted in pairs because every currency transaction involves buying one currency and selling another.
There are three rates you should know:
The difference between bid and ask is called the spread, and it is one way banks and exchange services make money.
Most major currencies - the U.S. dollar, euro, British pound, and Japanese yen - operate under a floating exchange rate system. Their values are determined by supply and demand in the open market, with central banks occasionally intervening to stabilize extreme moves.
Some countries use a fixed (pegged) exchange rate, tying their currency to another currency (usually the USD) at a set ratio. For example, the Hong Kong dollar has been pegged to the U.S. dollar since 1983. Fixed rates provide stability for trade but require the central bank to hold large foreign currency reserves to maintain the peg.
1. Interest rate differentials. When a country raises interest rates, its currency tends to strengthen. Higher rates attract foreign investors seeking better returns on deposits and bonds, increasing demand for that currency. For example, when the U.S. Federal Reserve raised rates aggressively in 2022-2023, the dollar surged against most major currencies.
2. Inflation rates. A country with consistently lower inflation than its trading partners will see its currency appreciate over time. Lower inflation means the currency retains purchasing power, making it more attractive. Conversely, high inflation erodes a currency's value. This is why currencies in hyperinflationary economies (like the Venezuelan bolivar) lose value rapidly.
3. Trade balance. A country that exports more than it imports runs a trade surplus, which creates demand for its currency (foreign buyers need it to pay for goods). A trade deficit has the opposite effect. The U.S. has run a persistent trade deficit for decades, which puts downward pressure on the dollar - though other factors often offset this.
4. Government debt levels. Countries with large and growing national debt may see their currencies weaken. High debt raises concerns about future inflation (governments may print money to service debt) and about the country's ability to attract foreign investment. Credit rating downgrades can accelerate this effect.
5. Political stability and economic performance. Investors prefer to hold currencies of politically stable countries with strong economic growth. Elections, policy changes, geopolitical conflicts, and recessions all influence currency values. The Swiss franc and Japanese yen are traditional "safe haven" currencies that strengthen during global uncertainty.
6. Market speculation and sentiment. Currency markets trade over $7.5 trillion per day, and much of that volume is speculative. Traders bet on where rates are headed based on economic data releases, central bank statements, and technical analysis. Large speculative flows can move rates significantly in the short term, even without a change in economic fundamentals.
In mid-2024, the euro traded around 1.08-1.10 per dollar as the European Central Bank (ECB) began cutting rates while the Fed held steady. By late 2024, the dollar strengthened further as U.S. economic data outperformed Europe, pushing EUR/USD toward 1.04. In early 2025, the pair stabilized near 1.05-1.08 as the Fed signaled its own rate cuts. Through early 2026, EUR/USD has traded in the 1.06-1.10 range, reflecting a narrowing interest rate gap between the Fed and ECB.
When you exchange currency at a bank, airport kiosk, or hotel, you almost never get the mid-market rate. These services add a markup - typically 1% to 3% for banks and up to 8-12% for airport kiosks. On a $1,000 conversion, a 3% markup costs you $30.
Tips for getting the best rate:
After cutting rates three times in late 2024, the Federal Reserve paused in early 2025 and has held rates steady into 2026 as inflation remains slightly above the 2% target. The dollar index (DXY) has softened modestly from its 2024 highs but remains strong by historical standards. Meanwhile, the ECB and Bank of England have also paused their cutting cycles, creating a relatively stable rate environment across major pairs.
For travelers and businesses, this stability means less day-to-day volatility - but markups from exchange services remain high. Always compare the rate you are offered against the mid-market rate using a tool like our Currency Converter. Even small differences add up on large transactions. To understand how inflation affects your purchasing power over time, try our Inflation Calculator.
Disclaimer: This article is for educational purposes only and does not constitute financial advice. Exchange rates fluctuate constantly. The rates shown are approximate and may not reflect current market conditions.
