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CFA Level I · CFA Level I Exam · Types of Financial Returns

A fund returned +50% in Year 1 and -50% in Year 2. The geometric mean annual return over the two years is closest to:

The geometric mean is about -13.4% per year. Multiply the growth factors 1.50 and 0.50 to get 0.75, take the square root to get 0.866, and subtract one. The arithmetic mean of 0% overstates performance because it ignores compounding.

  1. A-13.4%Correct
  2. B0.0%
  3. C-25.0%

Explanation

Growth factors are 1.50 and 0.50, product 0.75. The square root of 0.75 is 0.8660, so the geometric mean is -13.4%. The arithmetic mean of 0.0% is the distractor that ignores compounding. Check: 0.866^2 = 0.75.

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