Sol:
Investment in stock 1 = $25,000
Beta of stock 1 = 0.8
Investment in stock 2 = $40,000
Beta of stock 2 = 1.6
Total investment = Investment in stock 1 + Investment in stock 2
Total investment = $25,000 + $40,000 = $65,000
Portfolio Beta = (Beta of stock 1 x Investment in stock 1 / Total investment) + (Beta of stock 2 x Investment in stock 2 / Total investment)
Portfolio Beta = (0.8 x 25000 / 65000) + (1.6 x 40000 / 65000)
Portfolio Beta = 0.30769 + 0.98462 = 1.29
Portfolio Beta will be 1.29
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