determination of exchange rates under fixed and managed systems
💱 Exchange Rates – Fixed & Managed Systems
In this lesson we’ll learn how exchange rates are set when a country chooses a fixed or a managed (managed‑float) system. We’ll use simple analogies, clear examples, and a few exam‑ready tips.
🔹 Fixed Exchange Rate System
In a fixed system the government or central bank sets the value of its currency against another currency (or a basket of currencies) and keeps it stable.
Think of it like a price tag on a toy that never changes. If the UK pegged the pound to the euro at 1 £ = 1.2 €, the pound’s value is “locked” at that rate.
- Central bank announces the peg.
- It buys or sells foreign currency to keep the rate at the target.
- Market forces (demand/supply) are offset by the bank’s interventions.
Key formula (simplified): $E = \frac{P_{\text{dom}}}{P_{\text{for}}}$ where $P_{\text{dom}}$ is domestic price level and $P_{\text{for}}$ is foreign price level.
| Feature | Fixed System | Floating System |
|---|---|---|
| Exchange Rate Determination | Set by central bank | Market forces |
| Policy Flexibility | Low – must maintain peg | High – can adjust via interest rates |
| Risk of Devaluation | High if reserves low | Low – market absorbs shocks |
🔹 Managed (Managed‑Float) Exchange Rate System
In a managed float the currency is mainly market‑determined but the central bank occasionally intervenes to smooth extreme moves.
Imagine a tightrope walker who usually follows the rope (market) but occasionally uses a safety net (intervention) to avoid falling.
- Currency floats freely in most circumstances.
- Central bank sells or buys currency when the rate moves outside a target band.
- Intervention is usually limited to maintain confidence, not to set a fixed rate.
Example: China’s yuan is managed against the US dollar. The People’s Bank of China intervenes to keep the yuan within a narrow range, but the rate still fluctuates within that band.
| Feature | Managed Float | Fixed |
|---|---|---|
| Exchange Rate Determination | Market with occasional intervention | Set by central bank |
| Policy Flexibility | Moderate – can adjust within band | Low – must maintain peg |
| Risk of Devaluation | Moderate – intervention limits but does not eliminate | High if reserves insufficient |
📌 Quick Review & Exam Checklist
- Fixed rate: Stability, low inflation, loss of monetary policy autonomy.
- Managed float: Market‑driven with limited intervention, moderate stability, better policy flexibility.
- Use the table comparison to structure answers.
- Remember the formula for purchasing power parity: $E = \frac{P_{\text{dom}}}{P_{\text{for}}}$.
- When asked about intervention, explain the role of foreign reserves and the central bank’s objective (e.g., preventing excessive volatility).
Revision
Log in to practice.