问题如下图：
选项：
A. 
B. 
C. 
解释：
不是只有cal线里才有optimal risky potfolio吗？market portfolio在cml曲线里呀？
Shimin_CPA税法主讲、CFA教研 · 2018年08月14日
CML也是有 optimal risky potfolio的，它是CML与有效前沿的切点。
capital market theory假设所有投资者有相同的预期，对市场和市场上所有的资产有相同的看法，所以所有投资者都会持有相同风险资产、相同权重的投资组合，在有效市场假设（efficient market hypothesis，后面会学到) 中可以证明这样的组合就是market portfolio. 所以在CML中，optimal risky portfolio=market portfolio=CML与有效前沿的切点.
NO.PZ2015121801000081 问题如下 With respeto capitmarket theory, the optimrisky portfolio: A.is the market portfolio. B.hthe highest expectereturn. C.hthe lowest expectevariance. is correct.The optimrisky portfolio is the market portfolio. Capitmarket theory assumes thinvestors have homogeneous expectations, whimeans thall investors analyze securities in the same wanare rational. This, investors use the same probability stributions, use the same inputs for future cash flows, anarrive the same valuations. Because their valuations of all assets are intical, all investors will invest in the same optimrisky portfolio (i.e., the market portfolio). 你好，题目中的最优风险组合，既不是最优组合，也不是最优风险资产组合的表述。根据CAL，与风险有关的资产组合不就是CAL与EF的切点么？有且只有一个。
NO.PZ2015121801000081 问题如下 With respeto capitmarket theory, the optimrisky portfolio: A.is the market portfolio. B.hthe highest expectereturn. C.hthe lowest expectevariance. is correct.The optimrisky portfolio is the market portfolio. Capitmarket theory assumes thinvestors have homogeneous expectations, whimeans thall investors analyze securities in the same wanare rational. This, investors use the same probability stributions, use the same inputs for future cash flows, anarrive the same valuations. Because their valuations of all assets are intical, all investors will invest in the same optimrisky portfolio (i.e., the market portfolio). 有个同学在这道题下面问了几个特别好的问题（1）在投资者都有相同预期的时候，CAL里面CAL和EF相切的T点optimrisky portfolio和CML里面CML和EF相切的M点market portfolio是同一个点吗？（2）在CAL里面投资者有不同的无差别curve，无差别curve和CAL的切点P点，CAL和EF的切点T点，P、T两点什么时候重合？（3）P点又和CML里面的M点有什么关系？之前答案老师的回答很简答，没有看懂，希望其他老师可以帮忙详细一下，谢谢
NO.PZ2015121801000081问题如下With respeto capitmarket theory, the optimrisky portfolio:A.is the market portfolio.B.hthe highest expectereturn.C.hthe lowest expectevariance.is correct.The optimrisky portfolio is the market portfolio. Capitmarket theory assumes thinvestors have homogeneous expectations, whimeans thall investors analyze securities in the same wanare rational. This, investors use the same probability stributions, use the same inputs for future cash flows, anarrive the same valuations. Because their valuations of all assets are intical, all investors will invest in the same optimrisky portfolio (i.e., the market portfolio).capitmarket theory 到底是哪个理论呢。我明白B和Ｃ错，也知道只有当投资者有一致预期的时候optimrisky portfolio就是market portfolio，可是本题也看不出来投资者预期一致啊。
NO.PZ2015121801000081 问题如下 With respeto capitmarket theory, the optimrisky portfolio: A.is the market portfolio. B.hthe highest expectereturn. C.hthe lowest expectevariance. is correct.The optimrisky portfolio is the market portfolio. Capitmarket theory assumes thinvestors have homogeneous expectations, whimeans thall investors analyze securities in the same wanare rational. This, investors use the same probability stributions, use the same inputs for future cash flows, anarrive the same valuations. Because their valuations of all assets are intical, all investors will invest in the same optimrisky portfolio (i.e., the market portfolio). A为什么正确？？？？？？
NO.PZ2015121801000081 CAL里面CAL和EF相切的T点optimrisky portfolio和CML里面CML和EF相切的M点market portfolio是同一个点吗？ 在CAL里面投资者有不同的无差别curve，无差别curve和CAL的切点P点，CAL和EF的切点T点，P点和T点重合的时候就是CML里面的M点吗？ 投资者有相同的预期在图形或者数学上是什么意思呢？