What is the ruling on short-term speculation in mixed and forbidden companies in the stock market?

Firstly, it is impermissible to invest in companies that deal in or trade with forbidden things, whether usury or otherwise, because the shareholder is a partner in the company's capital.

Secondly, it is impermissible to trade in prohibited or mixed shares, whether by selling, buying, or speculating, because selling what is forbidden is not allowed, and a contract that includes it is invalid. There is no difference in this ruling between speculation and long-term investment.