By definition the expected return on a portfolio is equal to the average of the expected returns of the assets that make up that portfolio .
从定义上讲,一个投资组合的预期回报率,等于该组合中各个资产的预期回报率的平均值。
All that the propensity of the public towards hoarding can achieve is to determine the rate of interest at which the aggregate desire to hoard becomes equal to the available cash .