What is the ruling on investing in online companies that guarantee a certain percentage of profit in exchange for capital invested in fields such as oil or pharmaceuticals?

It is not permissible for the profit to be a percentage of the capital, such as the capital being one hundred thousand and the profit 10%. Rather, the profit must be an undivided share, like a third or a quarter; otherwise, the partnership is invalid. Furthermore, companies that manage money online do not adhere to the Sharia regulations regarding immediate exchange (qabḍ), and in many cases, the traded goods are not real, which leads to gharar (uncertainty) and gambling. Therefore, it is not permissible to invest money in such companies unless they adhere to Sharia regulations.