請問long call delta = short call delta ? Short put delta = long put delta?

老師，我做押題時聽到老師講confidence zone and type one and type 2 error 好像講反了，想問我的思路對嗎？

怎么看出1.5是价值value？

老师好，由于本人高中部分知识点出现模糊，想确认一下图片中的自然常数e的公式中的∞是否同时代表+∞和-∞？还是说只代表正∞？谢谢。

52 III why is receiving fixed on individual loss slower ? Than the index

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 ???