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CFA Level I · CFA Level I Exam · Portfolio Risk and Return: Part I

Compared with a combination of two risky assets with correlation of +0.5, the same two assets with a correlation of -0.3 will most likely produce a minimum-variance frontier that is:

The frontier becomes more bowed to the left, giving lower risk for any given expected return. Expected returns do not change, but a lower correlation cuts the covariance term in portfolio variance, so greater diversification benefits appear at each weighting.

  1. Aidentical in shape, because expected returns are unchanged
  2. Bmore bowed to the left, offering lower risk for a given returnCorrect
  3. Cless bowed, offering higher risk for a given return

Explanation

Lower correlation reduces portfolio variance at every weighting while expected returns stay the same. The frontier therefore bows further toward the left (lower risk). Shape depends on correlation, not only on expected returns.

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