Is a fixed interest rate paid on stock transactions permissible?

For the permissibility of shares in companies, two conditions must be met: that the company's activity is permissible (halal (definition)), and that it does not engage in forbidden transactions, such as depositing funds in interest-bearing usurious banks. It is not permissible for the company to give the shareholder a fixed amount as profit; rather, his share must be a common percentage of the profit, unless it is a percentage added to the profit.