That's misleading because it really doesn't matter when you buy the stock, so you're not supposed to, as a broker, sell dividends.

这是误导,什么时候买股票都没区别,所以作为券商,不应以股利为卖点

耶鲁公开课 - 金融市场课程节选

You can call your broker and say, I'd like to short stock number one and what the broker will do is borrow the shares on your behalf and sell them and then you own negative shares.

你可以打电话给你的经纪人说，我要做空一号股票,经纪人就会在你的名下赊入这些股票,然后卖掉,这样你就拥有数量为负的股票了。

耶鲁公开课 - 金融市场课程节选