Short on the stock market

In the
Hello Rabbi,
I wanted to ask, does the Rabbi see a problem in that it is forbidden or at least inappropriate to make a short sale on the stock exchange on Israeli stocks or Israeli indices, out of joy for the sake of joy (allegedly better off with your brother than your enemy) or something like that?
I’m not talking about a problem with interest right now because, as far as I know, that company has a business permit.
With thanks