Is buying and selling shares in an electricity company through Arab Bank permissible (halal) or forbidden (haram), given that the bank takes a sum of money in exchange for its brokerage?

It is permissible to invest by purchasing shares under certain conditions, but dealing with a usurious bank as an intermediary in this investment is not permissible, due to the obligation to boycott usurious banks, unless there is no other means of buying and selling except through these usurious banks. In that case, the transaction is permissible to avert hardship and difficulty. If the bank is merely an intermediary and takes a known commission, then that is permissible.