Other Central Banks
Policy is set in several places at once, and the differences between them drive currencies, capital flows and the conditions faced by companies operating across borders.
MadStockAlerts Research · Updated August 28, 2026
What to take away
- Mandates differ: some are price stability only, some are dual.
- Rate differentials are a principal driver of currency movements.
- Some banks have used yield curve control and negative rates.
- A currency peg means importing another country's monetary policy.
- Divergence between major banks has effects far beyond their own economies.
MAD Academy Training Video · 0:44
Rates Are Relative Too
The Fed is not alone, and the gap between its policy and everyone else's drives currencies and capital flows.
This lesson is part of a Stock Alerts + Tools plan.
Mandates differ
| Type of mandate | What it means in practice |
|---|---|
| Price stability only | Employment is not a stated objective, so a weakening labour market is not itself a reason to ease |
| Dual mandate | Employment and prices, with the conflict described in the Federal Reserve article |
| Exchange rate objective | Policy is subordinated to maintaining a currency level or band |
| Financial stability responsibilities | Held alongside monetary policy in some jurisdictions and separately in others |
The differences matter for anticipating a reaction. A central bank with a single price mandate responds differently to a growth shock than one with a dual mandate, and the difference is written into the institution rather than being a matter of preference.
Rate differentials and currencies
Capital moves toward higher returns, other things equal, so a widening gap between two policy rates tends to move the currency pair between them. That relationship is the clearest single link between policy and currency markets.
Scroll the chart sideways to see all of it.
- Rate differential, percentage points
- The currency pair, indexed
Tools other banks have used
- Negative policy rates, charging banks for holding reserves, used in several jurisdictions.
- Yield curve control, committing to buy whatever is required to hold a yield at a target.
- Direct purchases of equity index funds, used in one major economy.
- Currency intervention, buying or selling reserves to affect the exchange rate.
The second is worth knowing about because it changes what a bond yield means. Under yield curve control, a yield is a policy setting rather than a market price, and it stops carrying the information a market-determined yield does.
Pegs, and imported policy
An economy pegging its currency to another's must set policy consistent with maintaining the peg, which means importing the larger economy's monetary policy regardless of local conditions.
This is the practical form of the constraint that a country cannot simultaneously have a fixed exchange rate, free capital movement and an independent monetary policy. Choosing any two rules out the third.
Why divergence matters beyond the countries involved
When major central banks move in different directions, the effects reach economies that made no policy change at all.
| Channel | What happens |
|---|---|
| Currency | Capital moves toward the higher rate, which moves the pair |
| Dollar debt | A stronger dollar raises the servicing cost for foreign borrowers |
| Capital flows | Emerging markets face outflows when developed rates rise |
| Imported inflation | A weaker currency raises the cost of imports, including energy |
| Forced response | Central banks raise rates to defend a currency rather than for domestic reasons |
The last row is the one with the largest consequences. A central bank raising rates into a domestic slowdown because its currency is falling is setting policy for the exchange rate rather than for its own economy, and it happens regularly.
That is the practical form of the constraint described above: with free capital movement and a currency to defend, monetary independence is the thing that gives way.