Is dealing with an intermediary company for buying and selling gold on the international stock exchange, which includes what is called "selling first," considered a Salam sale, and is it permissible to deal with it without leverage while paying the money in advance?

The permissibility of investment methods in gold hinges on the occurrence of taqabud (mutual possession) during the contract session, either actually or constructively. Constructive possession is realized by isolating and designating the gold and enabling the buyer to dispose of it. It is impermissible to sell an unspecified gold bar or without actual possession. As for salam (forward contract) in gold, it is not permissible unless the capital is not from prices (athman) or currencies, because salam requires deferment and postponement. Salam in gold is not permissible with gold, silver, or currency.