做思维导图的时候，futures和forward应该放一起还是分开啊，看笔记感觉好乱啊，一会儿futures一会儿forward的，不知道应该怎么整理。所以说futures和forward的到底有什么区别，除了是在不同的市场上交易，定价有差吗，市场变化一样吗

请问，为什么题目算债券B价值用e折现？我用计算器算pv是否可以？

Sortino ratio calculation: MAR is pre-setted, not the kind of mean of sampl, MAR WILL NOT alter the degree of freedom, why the denominator has the way to get the deviation as the samplling deviation computation? The function should be wrong, IF no return is below the MAR, whta is meaning of the function? sum o to o, makes no sense to the function. so, T sould be sums from 1, not zero, to a certain count. thanks!

Sortino ratio calculation: MAR is pre-setted, not the kind of mean of sampl, MAR WILL NOT alter the degree of freedom, why the denominator has the way to get the deviation as the samplling deviation computation?

为什么分母的指数是0.25*2？不是90/360吗

A bank has sold USD 300000 of call option on 100000 equities，使用equity对冲期权，0.5是期权的delta，为什么不是用0.5*300000（期权的价值）呢？

期权中，long方的风险为什么通常来说比short方要大？

1. 6%不是半年期利率吗，为什么付款日收到的钱是30000不是60000？

期权中，long方的风险为什么通常来说比short方要大？

为什么答案是不去prn？直接用初始本金乘smm