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Question 5.18: Show that the beta factor βV of a portfolio consisting of n ...

Show that the beta factor β_V of a portfolio consisting of n securities with weights w_1, . . . , w_n is given by β_V = w_1β_1+· · ·+w_nβ_n, where β_1, . . . , β_n are the beta factors of the securities.

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