Portfolios Below is given the standard deviation and correlation information on three South African companies, Afgri, Harmony
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Portfolios Below is given the standard deviation and correlation information on three South African companies, Afgri, Harmony Gold and SABMiller.
Afgri Harmony Gold SABMiller Standard Deviation (%)
Afgri 1 −0.2 0.5 29 Harmony Gold 1 0.4 21 SABMiller 1 23
(a) If a portfolio is made up of 30 per cent of Afgri, 40 per cent of Harmony Gold and 30 per cent of SABMiller, estimate the portfolio’s standard deviation.
(b) If you were asked to design a portfolio using just Harmony Gold and Afgri, what percentage investment in each share would produce a zero standard deviation?
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