请问老师，CV中的下方均值为什么是算术平均而不是加权平均

视频不完整

bank reserve越大，为啥MS越大？按照图中示例，商行有100，reserve requirement是10，贷出去70，bank reserve是20。如果bank reserve增大，比如由20增大到30，那么贷出去的钱就减少10，由70减少到60，那MS相应地应该减少才对啊！不明白

FRM的专题训练，怎么有这么多CFA I 的题目？

cannibalization 是什么意思？谢谢

麻烦老师解释一下 第20题 对答案有些不太理解

13.单选题 已收藏 标记 纠错 The yield on a U.S. Treasury STRIPS security is also known as the Treasury: A spot rate. B yield spread. C forward rate. 查看解析 上一题 提交试卷 正确答案A 您的答案B本题平均正确率：49% Securities issued by sovereign governments难度：一般 推荐：      答案解析 A is correct because a STRIPS security is a zero-coupon bond with no default risk and therefore represents the appropriate discount rate for a cash flow certain to be received at the maturity date for the STRIPS. 问：strips到底是投行将之剥离成n个零息债券，还是财政部自己剥离的？谁做的这个操作？

如图 那样write down假设没有发生的话不是应该inv就变成原来那样就上升了嘛？ 这题目问的什么意思啊 总觉得题目有问题

01.单选题 收藏 标记 纠错 When taking commercial bank into consideration, holding reserves with central bank is: A a mandatory requirement. B an opportunity cost. C a good instrument to receive interest on excess funds. 查看解析 下一题 正确答案B 您的答案C本题平均正确率：20% Short-term funding alternatives难度：一般 推荐：      答案解析 B is correct. Funds held in reserve with the national central bank are an opportunity cost because they cannot be invested with higher interest or loaned out to consumers or commercial enterprises. A is incorrect because although many countries require deposit-taking banks to place a reserve balance with the national central bank, this is not always the case. C is incorrect because some central banks pay no interest on reserve funds, and sometimes even charge for keeping reserve funds. 问：如果按着机会成本-即 次优收益 来理解B?

当inventory被write down后COGS是变小吗？