Glossary

Real exchange rate

The real exchange rate between two currencies combines the nominal exchange rate with the ratio of the price of goods or services in two different countries.

The currency exchange rates that we see and use every day are nominal exchange rates. They tell us what we get if we swap a unit of one currency for another – for example, a pound-dollar exchange rate of $1.25 means that we get 1.25 dollars for every pound. This is all that matters if we are buying something from abroad or sending money internationally. But it doesn’t tells us everything we want to know about the value of different currencies. 

For more insight into this, we can use the real exchange rate (RER), which combines the nominal exchange rate with the ratio of the price of goods or services in the two countries. Say that a burger costs $5 in the US, but £3 in the UK. Then the real pound-dollar exchange rate based on burger prices is 1.25×(3÷5)=0.75. This is lower than one, which says the pound is undervalued (the RER will be one if the burger costs the same in both countries once both exchange rates and local prices are taken into account). 

In practice, a real exchange rate is calculated by using the price of a basket of goods and services (eg, a consumer price index) not one item. And we consider the trend in the RER index over the long term, rather than at a single point in time. Due to frictions such as trade barriers, transport costs or local taxes and their effect on price, the RER between two countries might persistently be higher (or lower) than one and what really matters is whether it is much higher or lower than usual.

We are often interested in how cheap or expensive a currency is on a global basis. For this, we can consider its effective exchange rate (EER), which is an index that measures the nominal value of a currency against a basket of other currencies (eg, a country’s major trading partners). The real effective exchange rate (REER) is an index calculated in the same way using RERs and provides a measure of a country’s competitiveness. A low REER means its exports should be more competitive on price.

Recommended

How the UK can help solve the semiconductor shortage
UK Economy

How the UK can help solve the semiconductor shortage

The EU’s plan to build a semiconductor manufacturing industry will fail, but the UK should take advantage of that, says Matthew Lynn
26 Sep 2021
The charts that matter: China upsets cryptocurrency markets
Global Economy

The charts that matter: China upsets cryptocurrency markets

Bitcoin slid again this week after China declared all cryptocurrency transactions illegal. Here’s what’s happened to the charts that matter most to th…
25 Sep 2021
How to cut your energy bill this winter
Personal finance

How to cut your energy bill this winter

Gas and electricity prices have risen by more than 250% so far this year. And they’re likely to go higher still Saloni Sardana looks at what can you …
24 Sep 2021
Cryptocurrency roundup: China’s crackdown intensifies
Bitcoin & crypto

Cryptocurrency roundup: China’s crackdown intensifies

Most major cryptocurrencies suffered falls this week as China cracked down even harder, while the Evergrande crisis rattled global markets, including …
24 Sep 2021

Most Popular

Two shipping funds to buy for steady income
Investment trusts

Two shipping funds to buy for steady income

Returns from owning ships are volatile, but these two investment trusts are trying to make the sector less risky.
7 Sep 2021
A nightmare 1970s scenario for investors is edging closer
Investment strategy

A nightmare 1970s scenario for investors is edging closer

Inflation need not be a worry unless it is driven by labour market shortages. Unfortunately, writes macroeconomist Philip Pilkington, that’s exactly w…
17 Sep 2021
Should investors be worried about stagflation?
US Economy

Should investors be worried about stagflation?

The latest US employment data has raised the ugly spectre of “stagflation” – weak growth and high inflation. John Stepek looks at what’s going on and …
6 Sep 2021