为什么买卖的时候的应计利息都是0.15呢？？？

这个题没听懂，而且我翻看了以前的课件和发的中文教材，也没有找到这个知识点在哪里出现过？请问题目是否超纲，另外请详细讲一下解题思路，以及要用到哪些知识点。

题目的分析都是站在买方的吧？题目没有明确告诉是买方还是卖方的时候，都默认是用买方角度考虑，对吗？

所以如果题目不明确告诉是买还是卖，都默认是站在买入期权的一方考虑问题，对吗？

为什么风险系数是1.4就需要做空

A stock with an expected return of 9.0%：不应该表示E(rp)吗为什么题目中表示成了R（f）

factor up代表的是什，卡面的代笔表的是什么

F&F have observed: firms with high ratios of book-to-market value are more likely to be in financial distress and that small stocks may be more sensitive to changes in business conditions. 如何理解这句好

 The differences between CAPM and APT:  CAPM is a one-factor model and APT is a multi-factor model.  CAPM is a special case of APT.  APT is often used to decompose the factors' respective contributions to the expected return.中最后APT is often used to decompose the factors' respective contributions to the expected return.如何理解这句话

each by a relatively small dollar amount如何理解