The best portfolio will be a combination of lending or borrowing, plus investment in the stock portfolio with the highest ratio of expected risk premium to standard deviation. See Figure 8.6.

• 最优投资组合会是一个借款或贷出再加上投资于有最高的期望风险溢价对标准差比率的股票投资组合的混合。参见图示8.；6。