What is the ruling on investing in the shares of companies that deal in permissible goods (such as computers and clothing), but have some usurious transactions of their own or with their customers, or may be based on an interest-bearing foundation such as borrowing from banks with interest?

Two conditions are required for the permissibility of trading shares: that the company's activity be permissible, and that the company does not deposit any part of the shareholders' money in usurious banks to earn interest. If these two conditions are met, investment is permissible, even if the company has other branches that deal in usury. It is preferable for a Muslim to invest in companies that do not deal in usury or through Islamic banks to avoid doubtful matters.