什么时候用dollar var，什么时候用%var，做题的时候很容易混，尤其这种给了权重的。

Bank A, which is AAA rated, trades a 5-year interest rate swap (semi-annual payments) with Bank B, which is rated BBB. Because of Bank B's poor credit rating, Bank A is concerned about the 5-year exposure it is going to run because of the swap deal. Which of the following measures help mitigate Bank A's credit exposure to Bank B? Ⅰ.Negotiate a CSA with Bank B and efficiently manage the collateral management system Ⅱ.Execute the swap deal as a reset swap wherein the swap will be marked to market every six months Ⅲ.Execute the swap deal with a break clause in the third year Ⅳ.Decrease the frequency of coupon payments from semi-annual to annual 老师，是A付coupon给B吧？那减少付款频率，不是降低exposure，为什么第四个不对呢

How about risk free asset?

Why answer b is wrong ?

Convertible bond中的call是谁的权利？是发行方的吗？什么时候会债转股？

请问什么是swap rate

蓝字部分，一级中duration不是mac duration除以1+y吗？mac duration表示汇款天数，duration衡量风险吗？这个duration=1/2怎么解释。

老师你好，这个欧洲美元如果libor是3%，如果讲义中的公式括号内不带百分号的话，结果算出来是不一样的，那么图中哪个公式结果是对的呢？

请问544题应该怎样理解？

老师，这两个题有什么区别？为什么算WCL的时候不一样？