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Lesson 104 G2aG2b

Four-way equivalence

In this lesson, you'll learn how four-way equivalence brings together interest rate parity, purchasing power parity, the Fisher effect, and expectation theory to explain relationships between exchange rates, interest rates, and inflation in international finance.

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In this lesson

  1. 0:00 Four way equivalents overview
  2. 1:07 International Fisher effect explained
  3. 1:38 Four way equivalence framework
  4. 2:29 Worked example with calculations
  5. 3:18 Real interest rates equalisation

About this lesson

You'll discover why these four concepts must align in equilibrium and how to apply the model to predict nominal interest rates, future spot rates, and real interest rates across countries. This is essential knowledge for FM (Financial Management) and AFM (Advanced Financial Management) papers, where international parity relationships frequently appear in both objective tests and case studies. The lesson walks through the Fisher effect formula (which links nominal rates, real rates, and inflation), the international Fisher effect (which connects interest rate differences to expected exchange rate changes), and how all four theories interconnect. You'll work through a practical example comparing two countries with different inflation and interest rates, using the four-way equivalence model to determine which statements about nominal rates, future spot rates, and real rates are correct. By mastering this framework, you'll be able to confidently handle international finance questions that test your understanding of how markets adjust to maintain equilibrium across borders.

Duration: 4m

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