56，谢谢老师

请问，下面官网题中，Long是养老金的人啊，就是客户，客户被investemnt manager邀请，应该都可以接受吧？那如果invest manager想给客户组织一个豪华旅行，客户可以接手啊？Q. Long has been asked to be the keynote speaker at an upcoming investment conference. The event is being hosted by one of the third-party investment managers currently used by his pension fund. The manager offers to cover all conference and travel costs for Long and make the conference registrations free for three additional members of his investment management team. To ensure that the conference obtains the best speakers, the host firm has arranged for an exclusive golf outing for the day following the conference on a local championship-caliber course.

在反优化中，知道weight，不知道预期收益，收益率的波动率和收益率之间的相关系数都是根据收益计算的，怎么能知道？

我觉得老师讲得不对，请解惑。美国人投资英国股票，收益为Rfc及Rfx，股票hedge的是beta，hedge完股票风险后beta=0，Rfc中仅存risk-free部分，Rfx没有变化，所以收益应该是英国Rf+Rfx，这是第一步的结论。之后如果再hedge外汇风险，Rfx就没了，应该剩下英国Rf，这是第二步的结论。

老师，问答题什么情况可以直接复制粘贴题目中的话？justify时？什么情况不可以。

bull call 的breakeven st是怎么推算出来的

这里为什么decision price是23.01？delay cost不是下单时的价格（arrival price）—决策价格？是因为这个题是开盘前决定了心里价位，所以decision用开盘价？

形状能画出来，但为啥duration neutral flattening就是short两年期的long10年期的呢，这来源是啥

老师看看我画的图对不

老师您好，官网模拟题３３为什么选Ｂ？３４题ｃａｌｌ　ｐｒｅｍｉｕｍ为什么不用２.４？