What is the ruling on buying and selling shares in the Islamic Bank?
Question

                What is the ruling on buying and selling shares in the Islamic Bank?.
Praise be to Allah.If this bank is calling 
    itself “Islamic” in order to deceive people, and it is dealing in riba or 
    other haraam transactions, then it is not an Islamic bank, and it is not 
    permissible to buy shares in it, or to buy and sell its shares, because that 
    is cooperating in doing something haraam. Allaah says (interpretation of the 
    meaning): 
“Help you one another in 
    Al‑Birr and At‑Taqwa (virtue, righteousness and piety); but do not help one 
    another in sin and transgression”

    [al-Maa'idah 5:2]

    But if this bank is really Islamic, and organizes its 
    dealings in accordance with the Qur’aan and Sunnah, and does not engage in 
    haraam transactions, then there is nothing wrong with buying shares in it 
    and trading in its shares. Rather that should be done, because it will 
    encourage it and help it to deal with the challenges it faces as a result of 
    the spread of riba and haraam transactions. 

    In the answer to question no.
    47651 we have explained the 
    characteristics of an Islamic bank. 

    In Fataawa al-Lajnah al-Daa’imah (13/506) it says: 
If banks are based on 
    riba and deal in riba, then it is not permissible to buy shares in them, 
    because this is cooperating in sin and transgression, which Allaah has 
    forbidden when He said (interpretation of the meaning): 
“but do not help one 
    another in sin and transgression”

    [al-Maa'idah 5:2]. End quote. 

    It also says (13/507): 

    It is permissible to buy shares in banks that do not deal 
    with riba, and to take the profits that come from buying shares in the bank, 
    because this is the result of a transaction that is not haraam and there is 
    nothing wrong with it, so it is halaal. End quote. 

    It also says (13/508): 

    Buying shares in banks or companies that deal with riba is 
    not permitted. If a subscriber wants to get rid of his riba-based shares, he 
    should sell his shares at the current market value but only take his 
    capital; the rest should be donated to charity. It is not permissible for 
    him to take any of the interest of his shares or riba-based profits. But if 
    the shares are in a company that does not deal with riba, then their profits 
    are halaal. End quote. 

    And Allaah knows best.