这里2A per B 为什么是 A=2B?

过往不代表未来，好汉不提当年勇

71题，unemployed 为什么不要加上摩擦性失业人数呢？而是只算unemployed呢？

35题为什么不是A，不是只有3家公司吗？

Kate works for a local asset management firm. A broker is offering a new trading service to Kate, who originally provided Kate with proprietary research through client brokerage arrangements. Low-fee and execution-only trades are offered to complement its traditional full-service, execution-and-research trades. Moreover, the broker will apply the commissions paid on the new service toward satisfying the brokerage commitment of the prior full-service arrangements to entice Kate and other asset managers to send additional business its way. Kate has always been satisfied with the execution provided on the full-service trades, and the new low-fee trades are comparable to the fees of other brokers currently used for the accounts that prohibit soft dollar arrangements. Which of the following is correct regarding to Kate’s action? 这道题看不懂完全，麻烦详细解析下意思

Strips和美国国债treasury 一样吗？

收益率与价格变动方向不是相反的么？此处写久期分别为2和5，是否有问题？久期等于价格变动除以收益率变动。

Interest rate risk for a bond refers to the fact that when interest rates: A decrease, the realized yield on the bond will be less than the yield to maturity. B increase, prepayments of principal will decrease. C increase, the bond’s value decreases. B选项 R升高 再融资成本高 借款人不愿意提前还款，所以本金的提前还款会减少；R降低再融资成本低 借款人愿意提前归还现有借款 再在市场重新借款 本金的提前还款会增加。 所以b没问题吧

这道题不懂。。。能再详细解释下吗

这道题老师讲的是没有违反，答案是违反了