R10，第28、29题不太懂。不知道从哪里着手。

R14 31

R14 29

嗯，能不能帮忙解释一下绿色荧光笔部分直接翻译过来是什么意思，什么叫provide input？谢谢。

如何理解第一题

第二题如何理解

为啥做空股指期货是把贝塔降为0

reading 21的第11题帮忙讲解下，B和C为什么不对？

机构IPS的一道官网题解析

B is correct. Active share changes only if the total of the absolute values of the portfolio’s active weights changes. For the two trades in Fund 3, both the initial position and the new position involved two stocks such that one was 1pp underweighted and the other was 1pp overweighted. Although the active weights of particular securities did change between the initial position and the new position, the total absolute active weights did not change. Therefore, the portfolio’s active share did not change 第一个交易完成后 两个 股票 的 权重 和 benchmark一致，所以 active share不变， 这个 可以 理解 ，但是 第二个 交易一个 超配了 1pp，另一个 低配了 1pp，avtive share不是 1pp吗 ？再就是 怎么 理解 Active share changes only if the total of the absolute values of the portfolio’s active weights changes.这句话