老师 52题 怎么做？ 谢谢

老师 这题是不是应该选A？谢谢

老师您好，请问598题为什么在deep in the money时用delta-normal方法计算VaR准确，那在deep out of the money时呢？

Assume you take a short position in a March T-Bond futures contract and that the settlement price of the cheapest-to-deliver (CTD) bond in March will be 70. Also, assume that the conversion factor is equal to 1.3. You plan on delivering the bond’s coupon payments in May and November. If the accrued interest from November to March is equal to $1,500, what is the invoice price of this bond (face value = 100,000)? Invoice price is: clean price + accrued interest. 解答中0.7是怎么算出来的？ $100,000 × 0.7 × 1.3 + $1,500 = $92,500

老师，56题，谢谢！

note第三本里CTD的例题（116页）。1）为什么discount coupon payment用的是365天不是180天？coupon不是semiannual吗？5^-0.03*(90/365)。2）前面计算today cash price已经加过AI，为什么后面计算quoted future price又要减去AI？3）为什么QFP=96.49/1.1？前面不是已经计算了QFP=cash future price-AI吗？

题库里Collateral这个章节的题目有一个选项，Marketable securities can be used as collateral is not true.为什么？解答说是因为major collateral是用cash。但是这句话不是在问most common collateral呀？

麻烦老师讲解一下286题？

老师，我的计算器在债券估值一直计算不对。已经2nd清空之前数据，比如一年10%现值为100的债券，算终值，算出来只有100.8333，怎么弄呀

请老师讲解下135题的答案，没看懂