20. Relationship Between the Return on the Common Factor & Excess Return Excess return The return on the factor F If F = 0, then i > 0
21. Relationship Between the Return on the Common Factor & Excess Return Excess return The return on the factor F If we assume that there is no unsystematic risk, then i = 0
22.
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24.
25.
26.
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28.
Editor's Notes
The unsystematic risk is diversified away because the variance of row three tends to 0 as N goes to infinity.