1. Why Exchange Rates Move β Supply and Demand
Exchange rates are set in real time in the foreign exchange market based on how many buyers and sellers there are for a given currency. When more foreign currency flows into a country (through exports or foreign investment), the local currency tends to strengthen and the exchange rate falls; when demand for foreign currency rises, the rate goes up.
2. What Is a Reserve Currency?
A reserve currency is one used as the standard in international trade and financial transactions β the US dollar currently plays this role most prominently. Since major commodities like oil and a large share of countries' foreign exchange reserves are denominated in dollars, dollar exchange-rate movements have a major impact on the global economy.
3. Fixed vs. Floating Exchange Rate Systems
Under a fixed exchange rate system, a government or central bank sets and maintains the exchange rate at a specific level, while under a floating system, the rate moves freely based on market supply and demand. Most major economies today use a floating exchange rate system, with rates determined daily by the market.
4. How Exchange Rates Affect Prices and Trade
When the local currency weakens (the exchange rate rises), exporters gain a price advantage, but the cost of imported raw materials and energy can rise, adding upward pressure on domestic prices. Conversely, a stronger local currency lowers import prices but can hurt exporters' profitability.
5. Terms to Know When Exchanging Money β Base Rate and Spread
The base rate is the exchange rate quoted daily based on interbank transactions; when an individual actually exchanges currency, the bank's fee (the spread) is added, resulting in separate buy and sell rates. A higher preferential exchange rate discount means you exchange closer to the base rate, reducing your fee burden.
6. How Exchange Rates Are Quoted
Most countries quote how much one unit of a foreign currency (like USD) costs in the local currency β for example, "1,300 won per dollar." Under this method, a larger number means the local currency is weaker, so a "rising" exchange rate means the local currency has weakened.
7. What a Strong or Weak Local Currency Means
A stronger local currency means the exchange rate has fallen, letting the same amount of local currency buy more foreign currency; a weaker local currency means the exchange rate has risen. Overseas travel and studying abroad tend to be cheaper when the local currency is strong, while export-driven businesses often benefit more when it's weak.