这题试着以r_m,r_f,r_A求解,却一直卡住 想请强者好心帮忙解答一下～感激不尽！！ Assume capital markets are perfect (no corporate income taxes or other imperfections) and the Miller and Modigliani propositions hold. At a debt-to-equity ratio of 25%, a firm has a debt beta of 10% and an equity beta of 121.25%. The firm issues more debt and repurchases equity to bring its debt-to-equity ratio to 50%, where its debt beta is 17.5%. Question 1: Beta of assets in perfect capital markets What is the firm’s beta of assets at the debt-to-equity ratio of 50%? Question 2: Beta of equity in perfect capital markets What is the firm’s beta of equity at the debt-to-equity ratio of 50%? --

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