Why Exchange Rates Move: A Plain-English Guide

If you have ever checked the price of a currency two weeks apart and found a different number, you have seen an exchange rate move. Rates change because a currency is, in the end, something people buy and sell, and the balance between buyers and sellers is always shifting.

You do not need to be an economist to understand the main reasons. Here are the forces that matter most, in plain English.

1. Supply and demand

An exchange rate is a price: the price of one currency in terms of another. When more people want to buy US dollars with naira than want to sell them, the dollar becomes more expensive in naira terms. When dollars are plentiful and demand is quiet, the price eases.

Demand for foreign currency comes from importers paying overseas suppliers, families paying school fees abroad, travellers, and businesses settling foreign invoices. Supply comes from exporters, remittances sent home, foreign investors bringing money in and anyone selling the currency they hold.

2. Trade and export earnings

Countries earn foreign currency by selling goods and services abroad. Crude oil sales have long been a major source of Nigeria's foreign currency earnings, so changes in oil prices or output can affect how much foreign currency flows into the economy. When a country imports much more than it exports, it needs more foreign currency than it earns, which tends to weigh on its own currency.

3. Interest rates

Investors move money to where it can earn a better return for the risk involved. When a country's interest rates rise relative to others, its currency can become more attractive to hold, which supports it. When rates fall, or rates rise faster elsewhere, money can flow out. This is one reason central bank decisions are watched so closely around the world.

4. Inflation

Inflation is the pace at which prices rise. If prices rise faster in one country than in another, each unit of that country's currency buys less over time, and its exchange rate tends to reflect that loss of purchasing power. Over long periods, inflation differences are one of the most reliable drivers of currency movements.

5. Policy and regulation

Governments and central banks influence exchange rates directly and indirectly: through interest rate decisions, rules on who may buy foreign currency and for what purpose, and how the official market is managed. A change in policy can move rates quickly, which is why it is sensible to rely on current information rather than on what a rate was last month.

6. Confidence and expectations

Markets look ahead. If people expect a currency to weaken, they may buy foreign currency early to protect themselves, and that buying can itself push the rate. News, elections, global events and even rumours can shift expectations. Some of the sharpest short-term moves are driven more by sentiment than by any change in the underlying economy.

No one can reliably predict tomorrow's rate. What you can control is how clearly you understand the rate you are offered today.

What this means when you need currency

• Rates can change between enquiry and exchange. A rate you saw earlier is a guide, not a promise. Always confirm the rate that applies at the time you transact.

• A reference rate is not a transaction rate. Published reference rates are useful for context, but the rate a bureau de change offers to buy or sell at is set separately.

• Plan rather than guess. If you have a payment due on a fixed date, starting early gives you time to compare, ask questions and avoid deciding under pressure.

• Ask for clarity. A good dealer will happily explain the rate, the direction (buy or sell) and exactly what you will receive.

If you would like to talk through a currency need with our team, you can post an order and a member of staff will follow up to confirm the current rate and the details with you. Asking commits you to nothing.