In economic competition theory, the zero-profit condition is the condition that occurs when an industry or type of business has an extremely low (near-zero) cost of entry to or exit from the industry. In this situation, some firms not already in the industry tend to join the industry if they calculate that they will make a positive economic profit (profit in excess of the cost of acquiring investible funds). More and more firms will enter until the economic profit per firm has been driven down to zero by competition. Conversely, if firms are making negative economic profit, enough firms will exit the industry until economic profit per firm has risen to zero.
