原版书课后题第588页第4题。 为什么没有计算交易的数量呢？ 直接以三个单价来平均不合适吧？？？

market和cml sml都有关系，所以market risk是用sd还是beta来衡量呢？

这题为什么选的是a Optimal risky portfolio不是cal和ef的交点嘛？market portfolio是cml和ef的交点

题目中问的是financial statements，说的不是财务报表吗？而taxes payable不是税务报表的术语吗？为什么还选A？

老师好，请问R18课后题#21，不是很懂

请问求到了18，19，20，21 时刻的cost，不是应该是18的0时刻就是一开始的价格，不应该等于17end的价值吗。但为什么还需要用18的cost除去1.06. 谢谢

49. Acme Corp. purchased a new stamping machine for $100,000, paid $10,000 for shipping, and paid $5,000 to have it installed in their plant. Based on an estimated salvage value of $25,000 and an economic life of six years, the difference between straight-line depreciation and double-declining balance depreciation in the second year of the asset's life is closest to: A. $7,220. B. $10,556. C. $16,666. 您的答案：C 正确答案：B 得分：0分 解析: Straight line depreciation is (100,000 10,000 5,000 ? 25,000) / 6 = 15,000 each year. Double-declining balance depreciation in the second year is: 115,000 (2/3) (1/3) = 25,556. The difference is $10,556. Remember that salvage value is not part of the declining balance calculation. 这道题计算DDB，我有问题。资产原值（不包含剩余价值）/6年*2=资产原值*1/3（按照1/3来折旧），第二年还剩下5年，资产原值*1/3*2/5哇？

Which of the following statements is most accurate about the responsibilities of an auditor for a publicly traded firm in the United States? The auditor must: A. ensure that the financial statements are free from error, fraud, or illegal acts. B. state that the financial statements are prepared according to generally accepted accounting principles. C. express an opinion about the effectiveness of the company's internal control system 您的答案：C 正确答案：B 得分：0分 解析: For a publicly traded firm in the United States, the auditor must express an opinion as to whether the company's internal control system is in accordance with the Public Accounting Oversight Board, under the Sarbanes–Oxley Act. The opinion is given either in a final paragraph in the auditor's report or as a separate opinion. 这道题是这次的模考题，从答案解释来看，应该选B，所以我有点晕。

老师，这个total debt只含有息负债吗？还有capital是含有有息负债和equity嘛，那为什么A/P不算在里面呢？

反稀释的内涵，作用，怎么执行理解不了，能否通过一点生动的实际故事或者案例讲解