What is the ruling on making a settlement and paying $10,0 for a loss of $30,0 to a stock brokerage firm, or having them buy the same shares again and paying their value of $60,0 in interest-free installments?

"It is permissible to settle a debt if the creditor willingly waives part of his right, and he may discharge the debtor from the entire debt. However, it is forbidden for the debtor to stipulate this to the creditor, according to the majority of jurists, who explain that it falls under the category of usury.

Regarding the purchase of shares by installments, its ruling and regulations have been clarified in previous fatwas. It should be noted that some shares are permissible to deal with, while others are forbidden to purchase."