11.打圈圈的那个条件，有什么用？知识点是什么？是判断是gross revenue还是net revenue吗？

这个case的意思是不是说 1、ABC给提供了包机和旅馆，由于Hollis事前获得了允许，所以不算违反。 2、会议结束后，ABC提供了豪华酒店的午餐，因为没法提前获得允许，且事后披露了，所以也不算违反？

道德的4B这条没太搞明白，additional compensation是必须在事前披露且获得允许吗？如果是事后才披露就是违反了4B，没有违反1B？

老师您好，请问怎么理解此表中 strike price, risk-free rate, payments on the underlying, carrying cost 四项对option 价格的影响？不是死记硬背而是请老师解释一下其中原理～ 另外，European call & American call定义上有啥区别？ 谢谢老师！

Which of the following ratios would least likely measure liquidity? A Return on assets (ROA). B Quick ratio. C Current ratio. 这题不会吧？b和c才是衡量流动性的呀

For a stock that pays no dividends, the value of an American call option is most likely: A the same as the value of a European call option with otherwise identical features. B greater than the value of a European call option with otherwise identical features. C less than the value of a European call option with otherwise identical features. 为什么价格差异只看分红呢？

If three bonds are otherwise identical, the one exhibiting the highest level of positive convexity is most likely the one that is: A Putable. B Callable. C Option-free. 这题答案对吗？印象中是原版书课后习题，但是原版书答案不是这个

这个答案是怎么算出来的٩😐ི۶

When DFL = Operating income/Net income = 1.00, Operating income = Net income, meaning the fixed cost of debt is zero.这一句话对吗？

老师你好，这个k是怎么得出来的啊？