为什么有效边界是绿色的那条线

为什么有效边界是绿色的那条线

老师这道题为什么选B 能解释下思路嘛

第177题，8%是所有组合的标准差，为什么可以用作16种的s？

22.单选题 收藏 标记 纠错 John, a portfolio manager, claims to have consistently produced excessive returns (over and above the benchmark returns) 97.5% of the time due to her skill and not luck. To support her claim, she presents regression results based on 60 monthly observations as follows: alpha = 0.43%, standard error of alpha = 0.21% Would you reject the null hypothesis of true α = 0 and accept her claim of superior performance 95% of the time due to her skill? A t = 2.50; reject the null hypothesis; reject her claim. B t = 2.50; reject the null hypothesis; accept her claim. C t = 2.05; fail to reject the null hypothesis; accept her claim. D t = 2.05; reject the null hypothesis; accept her claim. 这道题到底是用单尾检验还是双尾检验 如果检验T统计量是否区别于零的话不是应该用双尾检验么 为什么答案给的跟单尾95%1.645去比而不是用双尾95%1.96比？

老师好，为什么equity增高，杠杆就是下降？asset不是等于liability +equity嘛？另外，为啥价格升高就代表高收益？这个是绝对的嘛？

老师，这一题第一个非累计优先股是属于一级资本的吧？为什么答案不选C呢？

这道题A和D选项能解释一下吗？

这里的5.6%说的是at the end of period，那这个指的是swap结束时候的利率吗...

题目上不是说用美元换加元吗，这个不是说明了收加元支付美元吗...