Real Effective Exchange RateREER
The real effective exchange rate is a currency’s average value against its trading partners, weighted by trade and adjusted for differences in inflation. It shows whether a country’s goods are becoming more or less competitive abroad.
A single exchange rate shows a currency against one partner. The real effective exchange rate goes further: it averages against many trading partners and adjusts for inflation, giving a cleaner read on whether a country's goods are getting cheaper or dearer abroad.
- Category
- Fundamentals and Macroeconomics
- Reading time
- 3 min
- Also called
- Real trade-weighted exchange rate, Real effective rate, Inflation-adjusted effective exchange rate
- Updated
REER in plain words
Start with the nominal effective rate (NEER): a trade-weighted geometric average of a currency's exchange rates against its partners.1
Adjust it for relative consumer prices and you get the real effective rate (REER).1
Higher readings mean a stronger currency: a rising NEER is nominal appreciation, a rising REER is real appreciation.1
How to read a REER series
Check the index base
Find the index — for the US, FRED publishes a monthly series based to 2020 = 100.2
Know the weights
Weight trading partners by how much trade they do.1
Separate price effects
Account for both exchange-rate moves and the inflation gap with trading partners.1
Read the direction
Read a rise as real appreciation.1
Compare with history
Judge the level against the country's own long-run average.
Link to trade
A real appreciation makes exports dearer and imports cheaper.
Worked examples
Example 1 — Inflation erodes competitiveness
Real appreciationA hypothetical currency is flat in nominal terms, but home inflation is 6% versus 2% abroad.
| NEER change | 0% |
| Inflation gap | +4 pp |
| REER change | about +4% |
Higher inflation than at trading partners pushes the REER up, making exports less competitive.1
Example 2 — Depreciation offset
No real gainA hypothetical currency falls 5% nominally while home inflation runs 5 pp above partners.
| NEER | −5% |
| REER | about 0% |
Price changes cancelled out the currency move, so real competitiveness is unchanged.1
Example 3 — Index reading
10% real appreciationA hypothetical REER index moves from 100 to 110.
| Start | 100 |
| End | 110 |
The REER is up about 10% — a real appreciation of that size.1
REER vs NEER
| Aspect | REER | NEER |
|---|---|---|
| Adjusts for inflation | Yes | No |
| Weights | Trade-weighted | Trade-weighted |
| Best for | Competitiveness | Nominal currency moves |
| Data lag | Longer, needs price data | Shorter |
Where REER is used
Currency valuation
Spot currencies far from their long-run average, a Mean Reversion signal.
Trade outlook
Judge export competitiveness alongside Gross Domestic Product data.
Central bank policy
A Central Bank watches REER for its effect on Inflation.
Macro portfolios
Size currency Exposure in international portfolios.
Advantages and disadvantages
Advantages
- Covers many trading partners at once.
- Adjusts for inflation differences.
- Good gauge of competitiveness.
- Published consistently by official bodies.
Disadvantages
- Depends on chosen weights and price index.
- Released with a lag.
- Index level has no natural fair value.
- Methods differ between publishers and countries.
Going deeper
Read as far as you need. Each level builds on the one before it.
Effective means many partners
Beginner
Because the NEER is trade-weighted, the biggest trading partners count most.1
Real means inflation-adjusted
Intermediate
Using official series
Advanced
The BIS broad indices cover 64 economies, and FRED republishes them as monthly indexes with 2020 = 100.2 Because the index is relative to a base year, judge levels against long-run averages, not against 100.
Common mistakes
Reading 100 as fair value
It is only the base year.
Confusing NEER and REER
Only REER adjusts for prices.
Ignoring the price index used
CPI and unit labour cost versions differ.
Using it for short-term trades
It moves slowly and is released late.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- REER averages a currency against many partners.
- It is weighted by trade.
- It adjusts for inflation differences.
- A higher REER means a real appreciation.
- Judge levels against long-run history.
Frequently asked questions
Who publishes REER data?
Is a high REER bad?
How often is it updated?
Further learning
- Inflation
The adjustment behind REER.
- Consumer Price Index
The usual price index used.
- Central Bank
Who watches exchange rates for policy.
- Exposure
Managing currency risk.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- Bank for International Settlements (BIS). Effective exchange rates - overview (opens in a new tab) Checked .
- Federal Reserve Bank of St. Louis (FRED). Real Broad Effective Exchange Rate for United States (RBUSBIS) (opens in a new tab) Checked .
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. We are not affiliated with any publisher linked above. Last reviewed . Report an error or request a source credit.