collateral markets

NO.PZ2020042003000016 问题如下 Whiof the following statements about the“Economic Function of Markets for Collateral” is NOT correct? Without the collateralmarkets, there woulno wto short a cash security; short positions coulnly createsynthetically. Reverse repo transactions areuseto borrow cash owners of bon. The collatermarketsenhanthe ability of firms to borrow money. Margin lenng is primarily useinvestorswishing to take leveragelong positions in securities, most often equities 考点对Economiof The CollaterMarket的理解答案B描述错误，本题选B。解析在Reverse repo transactions中，是以“买入债券”一方的视角看待的，通常是为了获得Bon的头寸They are useto finanlongpositions in securities, typically bon. 而Repo transactions是站在“债券卖出方”的视角看待的，目的是为了获得融资Repo transactions are usually intento borrow cash owners ofbon. 没有collateral，还可以有其他抵押方法的吧？比如交保证金什么的。为什么A是错的呢

Reverse repo transactions areuseto borrow cash owners of bon. The collatermarketsenhanthe ability of firms to borrow money. Margin lenng is primarily useinvestorswishing to take leveragelong positions in securities, most often equities 考点对Economiof The CollaterMarket的理解 答案B描述错误，本题选解析 在Reverse repo transactions中，是以“买入债券”一方的视角看待的，通常是为了获得Bon的头寸They are useto finanlongpositions in securities, typically bon. 而Repo transactions是站在“债券卖出方”的视角看待的，目的是为了获得融资Repo transactions are usually intento borrow cash owners ofbon. 老师，A，我理解如果风险低，不要抵押物也可以交易，那A不就错了吗？所以还是不太能理解

NO.PZ2020042003000016 4个问题如下 1. short a cash security是什么意思？ 2.cash security应该是类似流动性极好的国债？ 3.那么short cash security？就是向A银行借钱去把国债买过来，然后先卖到，最后以更低价格给买回来，还给A银行？是这个意思吗？4.就是前提是有抵押品，才能借到钱，然后才能去卖空？

NO.PZ2020042003000016 Margin Lenng不是借券卖出吗？