A trading event is a common phenomenon in the world of buying and selling But we have to come back to remember the purpose of the negotiation One of the goals is to reach a mutually beneficial agreement and no one feels wronged in the process of selling and buying A trading event is a common phenomenon in the world of buying and selling. But we have to come back to remember the purpose of the negotiation. One of the goals is to reach a mutually beneficial agreement and no one feels wronged in the process of selling and buying.