老师，第18题我还是不太明白为什么c选项是对的，为什么税率上升它的效率就会提高呢

积极组合管理的课后题6, 最优组合的权重由公示求得0.324。没有对应的选项，请讲解

讲解Tax loss carry forward的时，老师举了一个例子（图二）。 图二中，某企业第一年亏损100w，如果税率是25%，第一年的DTA怎么算？ 老师课上没讲。谢谢！

請問這題這樣的寫法有沒有需要加強的? Bond 3 declines the most given the expectation of the forecasted yield curve movement; 1. The spread duration is a measurement of price sensitivity of a bond to changes in underlying spread. A bond with a higher spread duration indicates a higher sensitivity to changes in prices given changes in underlying spreads; 2. Bond 3 has the highest spread duration, which indicates the highest price sensitivity to changes in underlying spread. The spread is expected to increase. Bond 3 is expected to have a negative impact on price the most compared with bond1 and 2. Bond 3 will underperform bond 1 and 2.

warranty liability 这个I/S 与 B/S方法都不太明白

老师，麻烦问下，case3的第四题，折现率上升，期初的PBO应该不受影响吧？

41题

请问模考一第九题为什么选A？

请问模考一第21题为什么选C？

什么时候premium＝intrinsic value➕time value了？视频把期权费和option value搞混了吧。A怎么理解