问题如下图：
doglyt · 2017年12月21日
因为表格上方那一段写了He will only make the added investment provided that the expected spread of the equally weighted investment is at least 0.5percent over the 10-year Treasury bond. 10-year Treasury bond de risk premium is 1%要判断是否要做added投资，就要用这三个investments的平均risk premium1.22%-1%再和0.5%比较