Buying shares then selling them to get money for his brother (tawarruq)
Question

                My brother asked me to take out a loan from the bank in my name, in the form of shares, and then sell them and give him the price in cash, and he will pay the bank the instalments in full. I am uncomfortable about this matter because he is paying more than he took. What is the ruling, may Allah bless you?.
Praise be to Allah.
      Firstly: 

    This transaction comes under the heading of tawarruq using 
    shares [tawarruq means buying an item to be paid for at a later date, then 
    selling it – to someone other than the person from whom one bought it – for 
    cash, usually at a lower price], and calling it a loan is clearly incorrect. 
    This is why you felt uneasy about it, because if it were a loan, it would 
    not be permissible to pay more than you take. 

    We have previously discussed tawarruq using shares and the 
    conditions of its being permissible in detail, in the answer to question no.
    118270. 

    If the conditions of permissibility are met in this 
    transaction, then there is nothing wrong with you getting involved in it in 
    order to do an act of kindness to your brother. So long as the transaction 
    is in your name, your giving the money to your brother is by way of a loan. 
    So if you buy the shares from the bank for 100,000 – for example – and you 
    sell them for 90,000, you are lending 90,000 to your brother, and he is 
    taking responsibility for the remaining ten thousand that belonged to the 
    bank, which you had to pay because of him. If the lender is doing a favour 
    to the borrower, he should not be penalised for that. “No ground (of 
    complaint) can there be against the Muhsinoon (good-doers)” [al-Tawbah 9:91]. 
    This is not regarded as a loan that brings a benefit, because in fact it 
    does not bring you any benefit except in the Hereafter, in sha Allah. 
    Concerning the reward for giving a loan, the Prophet (blessings and peace of 
    Allah be upon him) said: “There is no Muslim who lends something to another 
    Muslim twice, but it will be like giving charity once.” Narrated by Ibn 
    Maajah (2430); by Ibn Hibbaan in his Saheeh; and by al-Bayhaqi in a 
    marfoo‘ mawqoof report. Classes as hasan by al-Albaani in Irwa’ 
    al-Ghaleel, 5/225 

    And Allah knows best.