老师，23题的B仍然不太懂啥意思，再说一遍可以吗

老师，第5题和6题的，beta小，为什么风险小没明白；6题说badtime情况，视频里面老师说回到正常情况，题目里面哪句话能看出再问正常市场的情况？

押題q32 am I correct to indicate below? I think the video Indicated wrong on answer B and D Illquidity assets - infrequent trade - low volatility - overestimate Sharpe ratio but underestimate beta and standard derivation Liquidity asset - normal beta high volatility normal sharpe ratio

29 why is preferred stock of the return 3% call cost here ? But not return ???

Question 28, the lower confidence level means it reduce from 99% to 95% isn’t it the right area ( accept zone has been reduce 4 %? Which means T1 error increase ???

Question 28, the lower confidence level means it reduce from 99% to 95% isn’t it the right area ( accept zone has been reduce 4 %? Which means T1 error increase ???

在890·891题目中，1 ewma和garch的区别相同以及关系2 什么 是 hybrid approach ，有什么类型的，主要用来干什么的3 ewma和garch 适用条件是什么4 parametric 和nonparametric 法分别有哪些，适用于什么情况 886和888也麻烦你解释一下啦

884没看懂，然后885为什么会高估呢？他不是肥尾吗？ 老师，我想问一下895题，为什么评级下降会导致债券价格上升？

79题中为什么第一年违约之后第二年违约的概率不用算进去呢？

老师在解答exercise 1的最后，FRA乘以e^-3%*1. 这个是-3%是因为他是short 方所以写负的吗？