Why Interest Rates Matter
Interest rates determine the cost of borrowing money. When a central bank raises rates, holding that currency becomes more attractive because you earn more interest on deposits. Capital flows into the currency, and it strengthens. When rates are cut, the opposite happens.
This relationship is the foundation of forex fundamental analysis. The interest rate differential between two countries is one of the strongest predictors of exchange rate direction over the medium term.
The Major Central Banks
The central banks that move global markets most are:
- Federal Reserve (Fed) — US dollar. The most influential central bank globally.
- European Central Bank (ECB) — euro. Manages monetary policy for the Eurozone.
- Bank of England (BoE) — British pound. Meets eight times per year.
- Bank of Japan (BoJ) — Japanese yen. Known for ultra-loose policy.
- Reserve Bank of Australia (RBA) — Australian dollar.
Their scheduled meetings and press conferences are among the most significant events on the trading calendar.
Forward Guidance
Modern central banks don't just set rates — they communicate their future intentions. This is called forward guidance. Phrases like 'we expect rates to remain restrictive for some time' or 'further tightening may be appropriate' signal future policy direction.
Markets price in expected rate changes before they happen. If the market expects a rate hike and gets one, the reaction may be muted because it was already priced in. The real moves come from surprises — unexpected changes or shifts in language.
How to Trade Central Bank Events
Before a central bank meeting, check what the market expects using interest rate futures or fed funds rate probabilities. During the announcement, watch for surprises — an unexpected hold, a larger-than-expected cut, or hawkish/dovish language shifts. After the announcement, the press conference often moves markets even more than the decision itself.
Spreads widen significantly during these events. Use smaller position sizes and wider stops if trading through them.
Key Takeaways
- Higher interest rates attract capital and strengthen a currency
- The Fed, ECB, and BoE are the most market-moving central banks
- Markets react to surprises vs expectations, not the decision alone
- Forward guidance and press conferences often matter more than the rate itself
- Spreads widen during central bank events — adjust position size accordingly
