What is the ruling on trading gold on the stock exchange, or selling shares in gold blocks, or buying gold pieces, without actual or physical possession of the gold? And is constructive possession considered in these cases?

In the first scenario, the sale of gold is permissible if the buyer or their agent takes possession of it, and the price is recorded in their account. It is not permissible to leave the gold with the company without taking possession, unless the company is an agent for the buyer, taking possession of the gold and safeguarding it. As for the second scenario, the sale is not permissible due to the lack of possession of the gold. In the third scenario, sending the gold to the buyer is not considered possession, but isolating it in special vaults for the buyer by the seller might be considered constructive possession. In all cases, the possession of gold by the buyer or their agent is a condition because gold cannot be sold on credit.