What is the ruling on working for a financial brokerage firm that deals in stocks which one scholar deems unlawful, especially since sponsorship has been transferred to work for it, and what is the ruling on the money earned from it, and how should it and anything purchased with it be disposed of?

If the questioner's work is that of a stockbroker, the stocks must be permissible. Brokerage in forbidden stocks, such as those of usurious banks, is not allowed, and the money earned from it is illicit gain. If he works in both permissible and forbidden activities, he should dispose of the income from the forbidden by spending it on the welfare of Muslims. As for what he bought with his ill-gotten money, there is no harm in benefiting from it because the prohibition is on his liability. By disposing of the amount of the forbidden money, his liability is cleared. If his work is permissible and not related to forbidden stocks, his work is permissible, and he is not harmed by the company engaging in some forbidden activities. However, if his work necessitates falling into what is forbidden, he must leave it if he is able.