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黄石2024-12-16 09:20:03
同学你好。首先,基于factor beta和factor risk premium(表中factor下的两列),我们可以计算出APT模型下的expected return = 2% + 1.2*2% + 0.5*4% + 0.3*3% = 7.3%(即E[r] = risk free rate + beta1*risk premium(factor 1) + beta2*risk premium(factor 2) + ...)。接下来,我们可以基于现实中因子的shocks来对expected return作出修正,有revised expected return = 7.3% + 1.2*(4% - 3%) + 0.5*(5% - 4%) + 0.3*(0% - 2%) = 8.4%(即revised E[r] = E[r] + beta1*shock(factor 1) + beta2*shock(factor 2) + ...)。
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