单选题 An analyst does research about required rate of return. With respect to an investor's required rate of return, those components included in the nominal riskfree rate of return will most likely:
A. affect all of the investments.
B. be relatively constant over time.
C. affect the yield spread between government securities and corporate securities.

【正确答案】 A

【答案解析】[解析] 名义无风险收益率考虑了真实的无风险收益率和通货膨胀的预期，名义无风险收益率会影响所有无风险资产和风险资产的必要收益率，所以A正确。名义无风险收益率受真实的无风险收益率和通货膨胀的预期的影响，并不是均衡不变的，所以B错误。名义无风险收益率不会影响政府证券和公司证券的收益差，该收益差是受两者之间其他风险因素所影响的。