What an exchange rate is
Exchange rate: the price of one currency in terms of another, such as how many euros or dollars a pound will buy.
Stronger pound: each pound buys more foreign currency than it did before.
Weaker pound: each pound buys less foreign currency than it did before.
- Exchange rates move every day, so a UK business that trades abroad finds the price its overseas customers see, and the cost of the supplies it buys in, changing without it deciding anything.
- Two kinds of business feel the movement: the exporter that sells abroad, and the importer that buys from abroad.
- A movement that helps one of them hurts the other, so the effect only makes sense once you have said which of the two you are talking about.
- Treat the pound as a ticket for buying abroad: a stronger pound makes the ticket go further overseas, and a weaker pound makes it go less far.
- Foreign customers buying British goods hold the opposite ticket, which is why every movement has a winner and a loser.
A weaker pound
- UK exports become cheaper abroad. An overseas customer needs less of their own currency to buy the same British product, so it looks better value against local rivals.
- Export sales tend to rise, so the exporter's revenue and profit rise, and it may need extra output to meet the orders.
- The alternative is to leave the overseas price alone and collect more pounds from each sale, which raises profit per unit instead of raising sales.
- Imports become dearer. A UK business buying stock or raw materials priced in another currency must hand over more pounds for exactly the same goods.
- Its costs rise, so profit falls unless it puts its own prices up, and raising prices risks losing customers to a rival that has not.
- Weak pound: exports rise, imports dearer.
- A strong pound is simply the same line read backwards: exports fall, imports cheaper.
A stronger pound
- UK exports become dearer abroad. An overseas customer needs more of their own currency for the same British product, so it looks expensive next to a local rival and export sales tend to fall.
- To keep those customers the exporter can cut the price it charges overseas, but then it receives fewer pounds per sale and its profit margin is squeezed.
- Imports become cheaper. A UK importer hands over fewer pounds for the same stock, so its costs fall and its profit rises if it keeps its selling prices where they are.
- It can also pass the saving on as a lower shelf price and try to win sales from competitors.
- JCB exports diggers, so a weaker pound makes its machines cheaper for buyers in Germany and India and its export orders tend to grow.
- A Scotch whisky distiller gains in the same way, since a weaker pound makes a bottle more affordable in its overseas markets.
- Currys is on the other side of the same movement, because it buys much of its electrical stock from suppliers in Asia and a weaker pound raises what that stock costs it.

Always say who the change is good for
- Name the business before you name the effect, because the same movement that lifts a UK exporter's sales raises a UK importer's costs: a weaker pound is good news for JCB as an exporter and bad news for a retailer importing its stock.
- Plenty of UK businesses are both at once, importing materials and exporting the finished product, so a weaker pound lifts their export sales and their input costs together.
- Which side matters more depends on how much of the product's cost is imported and how much of its output is sold abroad, so use those details from the case.
- The commonest error is writing that a weaker pound is bad because everything costs more, without saying that it is only bad for the importing side.
- A change in the pound is a change in the price of foreign currency, not a rise in the price of everything sold in the UK.
- The usual wording is explain the impact of a fall in the value of the pound on this business, so decide first whether the business mainly imports or mainly exports.
- Build the chain in order: the direction of the pound, the price the other side now sees, the effect on sales or costs, then the effect on profit.
- You are asked to interpret the direction of the effect, so describe cheaper or dearer rather than trying to work out prices in another currency.
- What does an exchange rate measure?
- What happens to the overseas price of a UK exporter's product when the pound weakens?
- Why does a weaker pound raise the costs of a UK retailer that buys its stock from Asia?
- Which type of UK business gains from a stronger pound, and why?
- Why must an answer about the pound always say who the change is good for?