We won't sell short and make our fortune.

我们不搞卖空来发财。

The pros sell short, giving that stock a bit of a push.

专业人士开始做空，往下推动股票。

And the right to sell short should not be restricted arbitrarily.

而悲观者抛空的权利不应该被武断地禁止。

Margin money deposited into a stock account in order to borrow money to purchase or sell short securities.

保证金存在股票账户上用来借钱买卖短期证券的资金。