Which of the following statements about duration is most accurate? A Effective duration accounts for changes in a bond’s cash flows resulting from interest rate changes. B Modified duration is the most appropriate measure of interest rate sensitivity for bonds with embedded options. C Effective duration is calculated from past price changes in response to changes in yield. Approximate modified duration 和effective duration课上听到说是事后观察得到的数据，所以我觉得C也是对的吧

视频中老师不是说goodwill会出现在公司报表上吗？如果不是balance sheet的话，会出现在什么报表上面呢？另外是否只有identifiable IA可以计入amorzation?

老师,为什么不yong AER=(1+r/n)^n-1去年化ne?

For a forward contract with a value of zero, a situation where the spot price is above the forward price is best explained by high: A convenience yield. B interest rates. C storage costs. 怎么看出是持有现货？

为什么价格下降，demand加大curve右移不应该价格上升嘛

An investor buys a 10-year bond with a 7% annual coupon and a YTM of 6.5%. The YTM for the bond increases to 7.5%, just before the first coupon payment is made. Assuming coupon payments are reinvested at the YTM, the investor's return when the bond is held to maturity is: 这道题我算了一下数字，答案是否是6.63%？

不理解，为什么contango时收益小于0，backwardation时滚动收益大于0

规模经济，是只在 长期 才有的，短期就算Q↑ ATC↓也不能说规模经济，是吗？

老师你好，以本题为例，能否直接计算出资产2和资产3的相关系数？

请问下，这道题目中给了两个平均值，为什么默认选择算数平均？是课本中直接规定的吗？