He bought shares by means of a riba-based loan; what should he do?

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Ruling on what gold retailers do of taking the gold from the wholesalers and paying for it in instalments
Should he go for an interest-based mortgage if that is cheaper than renting?

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She did some training in the Islamic branch of a riba-based bank and she is asking about the ruling on her salary
He gave his car to someone to sell it and buy a newer model for him. Is this riba?
The bank offered to freeze part of his account in return for interest
Ruling on what gold retailers do of taking the gold from the wholesalers and paying for it in instalments
Should he go for an interest-based mortgage if that is cheaper than renting?

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