With reference to Islamic banks, they are investments in financial instruments using any of the suitable Islamic financial instruments.
Kafalatul ‘Awam
Iflas
Bai‘ al-sarf
Bai al-ta'ati
Diwan al-sawad
Bai‘ al-’ist’iman
Dhira al-ammah
Two-tier ’istisna‘
Qabd
Commenda