Monetization tools 课件中的short sale against the box中讲到“the investor is long and short the stock, expect to earn the risk- free rate of return”。
这里是怎么 earn the risk- free rate of return的?(之前衍生品的知识有点忘记了)
另外一个问题,就是我们炒股时,股票的资金账户中如果有钱的话,会赚取risk free rate of return吗?