In open economies, the exchange rate channel serves as a powerful pathway for monetary policy transmission, linking domestic interest rate adjustments to international trade balances and cross-border capital allocations.

When a domestic central bank raises interest rates relative to foreign benchmarks, international investors shift capital into domestic fixed-income assets to capture the higher yields. This capital inflow triggers an immediate currency adjustment:

Exchange Rate Appreciation = Domestic Yield Premium + Expected Depreciation Adjustment

The resulting appreciation makes domestic exports more expensive on global markets and foreign imports cheaper at home. This shift redirects consumer spending toward imported goods, cooling domestic production and helping lower local inflation pressures.