请问老师为什么afc会在q大到一定程度后趋近于水平？为什么不是0？

我记得之前老师讲的是，股票分拆和stock dividend不用加权平均（不用处理），因为分子分母要同时调整，和现在老师讲的不一样

凸性是什么作用呢，我记得好像课上说过second order是二次求导？为啥到这里就变成第二部分了....

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30. When preparing an income statement, which of the following items would most likely be classified as other comprehensive income? A. A foreign currency translation adjustment B. An unrealized gain on a security held for trading purposes C. A realized gain on a derivative contract not accounted for as a hedge B为什么不对呢？

请问一下，什么是serial maturity structure？

这个题什么解题思路 可以画图吗

第十八题

financial risk：credit market liquidity

12. A company previously expensed the incremental costs of obtaining a contract.All else being equal, adopting the May 2014 IASB and FASB converged accounting standards on revenue recognition makes the company’s profitability initially appear: A. lower. B. unchanged. C. higher. 为什么是HIGHER？