这个题目说债券有高的凸型为什么就一定是低的收益率呢

解析的最后purchase算式中少了△A.P 最后结果变小答案不变，但是还是解析说错了吧？

麦考利久期和修正久期 在课程中之前没有介绍过啊 是要去前导课程中看吗？

repair如何界定资本和费用呢

After an equal weighted index is constructed and the prices of constituent securities change, the index is no longer equally weighted. Therefore, maintaining equal weights requires frequent adjustments (rebalancing) to the index. Price-weighted indices are not rebalanced because the weight of each constituent security is determined by its price. For market-capitalization-weighted indices, rebalancing is less of a concern because the indices largely rebalance themselves.

老师好，图一中的A选项At the end of the lease, the asset is returned to the lessor.错误是因为finance lease的title transfer无偿所有权转移。但是图二的答案解释中又说到finance lease的承租人不拥有该项资产。为什么呢

The price return of the price-weighted index is the percentage change in price of the index: (68 - 75)/75 = -9.33%.

课程中老师提到：收是因为投资，支是因为融资。我理解要投资不是应该支出吗，融资后不是有现金流流入吗？晕了。

能把题目讲细致一点吗？

老师，请解释一下第2题，谢谢