All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and messenger.
May Allaah reward you for your keenness to verify the religious ruling concerning your life affairs.
As regards your question about taking part in stock dealings through buying and selling shares in the market, we have already issued Fatwa 1241 about this, clarifying the conditions for dealing in the stock market in general, so there is no need to issue a new Fatwa about the same thing again.
We have also clarified in Fatwa 92713 the ruling on unlawful types of stock shares and those that combine lawful and unlawful aspects.
Also, we have issued Fatwa 243805 clarifying that there is no permissible minimum limit of usury when dealing in shares. Therefore, one has to abide by these terms and conditions as clarified in the above-mentioned Fataawa when dealing in the stock market, and there is no difference between a person wanting to sell them immediately and one wanting to have a long-term investment in them.
Whenever these shares are lawful, it is permissible to buy them and sell them after acquiring and possessing them [i.e. after they enter in one’s possession and he is entitled to dispose of them as he wishes because of being their owner]
On the other hand, if a broker lends money to the investor to deal with it, then this is a loan that involves Riba (usury and/or interest) because the broker lends the money because of the commissions that he gets in circulation and when buying and selling; indeed every loan that yields interest is Riba.
As regards Sheikh Taqiyy Uthmaani, he is one of the scholars who are of the view that it is permissible to participate in buying and selling shares in a company whose earnings are mixed (combine lawful and unlawful earnings) according to certain terms and conditions. The view we adopt here in Islamweb is that participating in buying and selling shares in companies whose earnings are mixed is forbidden.
Also, in our site, it is not of our approach to pursue the statements of scholars and respond to them. We hope that we have sufficiently explained the matter in the Fataawa to which we referred you above.
Allaah Knows best.