What is the ruling on the profits from stocks and bonds and their specific zakat?

Zakat is obligatory on shares depending on the type of company. For purely industrial companies, Zakat is obligatory on the profits if they reach the nisab (minimum threshold) and a year has passed over them. As for purely commercial companies, Zakat is obligatory on the shares (both principal and profit) at their market value. If the shareholder intends to trade in industrial shares, Zakat becomes obligatory on them. For companies that are both industrial and commercial, Zakat is obligatory on their shares after deducting the value of buildings and machinery. Zakat is obligatory on bonds every year if they reach the nisab, but only on the principal capital, because interest is riba (usury) that must be disposed of. It is not permissible to buy interest-bearing bonds or to invest in companies whose dealings are prohibited by Sharia.