问题如下图：
选项：
A. 
B. 
C. 
解释：
老师，对最后一句不是很理解，为什么三个组合的期望值都一样，但是唯独1和2实现了风险值最小呢，谢谢🙏
NO.PZ2015121801000068 问题如下 analyst hma the following return projections for eaof three possible outcomes with equlikelihooof occurrence:If the analyst constructs two-asset portfolios thare equally weighte whipair of assets provis the least amount of risk rection? A.Asset 1 anAsset 2. B.Asset 1 anAsset 3. C.Asset 2 anAsset 3. is correct.equally weighteportfolio of Asset 1 anAsset 2 hthe highest level of volatility of the three pairs. All three pairs have the same expectereturn; however, the portfolio of Asset 1 anAsset 2 provis the least amount of risk rection. 我用计算器算出来1 2的r=0.5，1 3的r=-0.5，为什么是选择0.5而不是-0.5
NO.PZ2015121801000068问题如下analyst hma the following return projections for eaof three possible outcomes with equlikelihooof occurrence:If the analyst constructs two-asset portfolios thare equally weighte whipair of assets provis the least amount of risk rection?A.Asset 1 anAsset 2.B.Asset 1 anAsset 3.C.Asset 2 anAsset 3.is correct.equally weighteportfolio of Asset 1 anAsset 2 hthe highest level of volatility of the three pairs. All three pairs have the same expectereturn; however, the portfolio of Asset 1 anAsset 2 provis the least amount of risk rection.这个题怎么判断risk ction 用计算器的话
NO.PZ2015121801000068 问题如下 analyst hma the following return projections for eaof three possible outcomes with equlikelihooof occurrence:If the analyst constructs two-asset portfolios thare equally weighte whipair of assets provis the least amount of risk rection? A.Asset 1 anAsset 2. B.Asset 1 anAsset 3. C.Asset 2 anAsset 3. is correct.equally weighteportfolio of Asset 1 anAsset 2 hthe highest level of volatility of the three pairs. All three pairs have the same expectereturn; however, the portfolio of Asset 1 anAsset 2 provis the least amount of risk rection. 2资产取最大的时候3取最小，为什么2和3 不对呢
NO.PZ2015121801000068 问题如下 analyst hma the following return projections for eaof three possible outcomes with equlikelihooof occurrence:If the analyst constructs two-asset portfolios thare equally weighte whipair of assets provis the least amount of risk rection? A.Asset 1 anAsset 2. B.Asset 1 anAsset 3. C.Asset 2 anAsset 3. is correct.equally weighteportfolio of Asset 1 anAsset 2 hthe highest level of volatility of the three pairs. All three pairs have the same expectereturn; however, the portfolio of Asset 1 anAsset 2 provis the least amount of risk rection. 这题也是求组合的相关系数r对吧？相关性越大，越不能rerisk
NO.PZ2015121801000068问题如下analyst hma the following return projections for eaof three possible outcomes with equlikelihooof occurrence:If the analyst constructs two-asset portfolios thare equally weighte whipair of assets provis the least amount of risk rection?A.Asset 1 anAsset 2.B.Asset 1 anAsset 3.C.Asset 2 anAsset 3.is correct.equally weighteportfolio of Asset 1 anAsset 2 hthe highest level of volatility of the three pairs. All three pairs have the same expectereturn; however, the portfolio of Asset 1 anAsset 2 provis the least amount of risk rection.[2n[7]进入ta模式，依次输入X01=12，Y01=12；X02=0，Y02=6；X03=6，Y03=0，然后[2n[8]进入STAT模式，出现1-V，然后按向下箭头，就出现error提示了，请问这是怎么回事啊？
