NO.PZ2018070201000091
问题如下：
Which of the following is most accurate in the return-generating model?
选项：
A.Return-generating models are used to directly estimate the expected return of a security.
B.Return-generating models are used to directly estimate the weights of securities in a portfolio.
C.Return-generating models are used to directly estimate the parameters of the capital market line.
解释：
A is correct.
In the market model, Ri =αi +βiRm +ei, we use historical security and market returns to estimate the intercept, αi, and slope coefficient,βi. Based on the intercept and slope coefficient, we can predict firm-specific returns of a security.
Ri=α+βRm+e，根据实际的历史数据回归得到α和β。
得到α和β，然后再代入数据就可以得到预测的Ri，所以选A，老师我这样理解对吗？
