Selling Hair
Question :

Some women sell their hair to Muslims or non-Muslims and receive some money or some other useful items from them in exchange. Is it permissible to do this?

Answer :

Yes, it is permissible.

Stock Exchange
Question :

Is it permissible to buy and sell shares of companies in the Canadian and US stock exchanges?

Answer :

Yes, it is permissible; but it is not permissible to buy shares of companies that deal with prohibited matters like wine and pig and the like, if the buyer becomes a partner in owning such things.

Buying or Consuming Lawful Food
Question :

Is it allowed to buy or consume lawful food or drink, that is manufactured or processed by a company that manufactures or processes unlawful food or drink as well?

Answer :

If the products themselves are lawful to consume, then it is permissible to purchase them and consume them.

Currency Exchange
Question :

Is it allowed for Muslims to deal in currencies in the foreign currency exchange market?

Answer :

Yes, it is permissible.

Buy Stolen Goods
Question :

If we are purchasing something from a person, do we have to be concerned with the source of the sold merchandise? What if we know that they are stolen or acquired without the owner's consent? What if we doubt whether it is stolen or not?

Answer :

It is not permissible to purchase goods that are known to be stolen from Muslims or are taken from them by force or without their consent. If there is a doubt whether the goods are usurped or not, then it is still permissible to buy them, although it is better to refrain from such goods and purchase from a seller who is not doubted.

Sell and Buy
Question :

Can I sell the things that are freely available, for example, if I take free religious materials and sell it for money?

Answer :

If the free things are given as gifts, and they are not given with a condition that they are not to be sold, then one can sell them.

Selling Prohibited Items
Question :

A person has musical instruments and a gold ring (for men) from a time when he was not practicing Muslim. Can he sell them now? If he cannot to sell them, what should he do with them?

Answer :

If the musical instruments can be used to produce permissible kind of music then it is allowed to sell them. If this is not the case, he can discard them. It is permissible to sell the gold ring even if it is for men.

Selling Magazines
Question :

Is it prohibited to sell magazines with pictures of women who are dressed improperly and are posing in sexually enticing and arousing ways?

Answer :

If this involves propagating sins then it is impermissible.

Paying for Prohibited to Consume Meal
Question :

Can a Muslim living in a non-Muslim country pay for somebody else’s meal at a restaurant if the meal consists of non-halal food?

Answer :

If the other person at the restaurant was considered to be the buyer and customer, one is allowed to pay on his behalf. However, if he is paying for the other person, while considering himself to be party to the purchase, i.e. the actual buyer and customer, then he is not allowed to do so.

Something that does not Currently Exist
Question :

Can I sell something that does not currently exist, such as a calf which has not been born yet?

Answer :

In some cases, you can sell something that does not exist yet, like a calf, with certain general specifications that apply to a large number of such an animals. But selling a calf of a particular cow whose existence is uncertain and whose soundness is unknown is not a valid sale, if it is sold alone. If it is sold in this way in addition to another thing which does exists at that time in one transaction, then it is valid.

Bitcoin Virtual Cryptocurrency
Question :

Is buying, selling and spending Bitcoins permissible?

Answer :

The mentioned transactions are permissible, but the spread of such transactions might subject the monies of believers to danger, so one should act in precaution.