No single party sets an exchange rate. It emerges from buying and selling that never really stops. Understanding what drives that flow makes it easier to plan when to exchange.

The main drivers

• Policy interest rates — rate gaps between countries pull capital in and out
• Inflation — persistently high inflation tends to weaken a currency over time
• Trade and current account balances — strong exporters usually have stronger currencies
• Tourism — visitor spending is foreign currency flowing into the country
• Political stability — uncertainty moves investment money elsewhere
• Gold and oil prices — commodities feed straight into the trade balance
• Central bank policy — direct intervention shows up in the rate immediately
• The US dollar — the world’s reference currency touches every pair
• Foreign investment flows — in both equity and bond markets
• Market expectations — prices often move before the news actually lands

For a holiday exchange these forces can feel abstract, but the result is the number on the board in front of you. Checking the rate ahead of time, and picking your moment, genuinely saves money.

A simple rule: don’t exchange it all at once. Splitting the amount averages out the volatility.