问题如下：
Fama and French (1996) added two risk factors beyond the market index to explain past average rates of return. Which of the following ratios is a risk factor in the FamaFrench empirical model?
选项：
A. EBITDA to total sales
B. Current assets to current liabilities
C. Net profit to total assets
D. Book-to-market values
解释：
D is correct. Book-to-market values
HML is the difference between the returns on stocks with high book-to-market values and those of stocks that have low book-to-market values.
请问这个内容对应的讲义在哪里找啊
