Definition
Central BankA central bank manages a country or region's money supply and sets its key interest rate, making it one of the strongest drivers of currency values.
Example
If a central bank unexpectedly raises its policy rate by 0.50 percentage points when markets expected 0.25, its currency often strengthens sharply as traders reprice future returns.
In detail
Central banks are responsible for monetary policy. Most have a mandate built around price stability, often expressed as an inflation target near 2%, and some also have goals for employment or financial stability. The major central banks forex traders follow include:
| Central bank | Currency |
|---|---|
| Federal Reserve (Fed) | US dollar |
| European Central Bank (ECB) | Euro |
| Bank of Japan (BoJ) | Japanese yen |
| Bank of England (BoE) | British pound |
| Swiss National Bank (SNB) | Swiss franc |
| Bank of Canada (BoC) | Canadian dollar |
| Reserve Bank of Australia (RBA) | Australian dollar |
| Reserve Bank of New Zealand (RBNZ) | New Zealand dollar |
Main tools
- Policy interest rate: the most watched lever. Higher rates tend to attract capital; lower rates tend to discourage it.
- Forward guidance: statements about the likely path of future policy, which often move markets as much as the decisions themselves.
- Balance sheet policy: buying assets (quantitative easing) or reducing holdings (quantitative tightening).
- Currency intervention: buying or selling its own currency directly, which some central banks do occasionally to counter disorderly moves.
How it moves currencies
Markets trade expectations. If traders already expect a rate rise, the decision itself may barely move the currency. What matters is the surprise: a bigger or smaller move than expected, a change in tone, or a shift in the projected rate path. That is why the press conference and statement after a decision can trigger more volatility than the announcement.
Example
Suppose (illustratively) Central Bank A holds rates while signaling cuts ahead, and Central Bank B signals further increases. The expected interest rate differential shifts in favor of Currency B, and traders may adjust positions toward it well before any actual rate change.
Why it matters
Central bank meetings are among the highest-risk events on the forex calendar. Spreads can widen and price can gap. Knowing the meeting dates from the Economic Calendar is essential, even for purely technical traders. The Central Bank Policy lesson explains the process in more detail.
Last updated
Related terms
- Interest Rate DifferentialThe interest rate differential is the gap between the interest rates of the two currencies in a pair. It drives swap rates and influences capital flows.
- Fundamental AnalysisFundamental analysis evaluates currencies using economic data, interest rates, central bank policy and political events to judge what could drive their value.
- Carry TradeA carry trade is buying a higher-yielding currency against a lower-yielding one to earn the interest rate difference, while accepting exchange rate risk.
- SwapA swap, or rollover, is the overnight interest credited or debited when a forex position is held past the daily cut-off, based on the two currencies' rates.
- VolatilityVolatility measures how much and how quickly a currency pair's price moves. Higher volatility means bigger swings, which raises both opportunity and risk.