在一个成熟的股票市场上，所谓上市公司的“退出机制”是指，当出现以下几种情况时，上市公司将退出市场交易：第一，当上市公司因经营状况恶化失去了投资价值，不符合证券交易所的上市条件时，交易所可以宣布该公司退市；第二，原来在多个证券交易所挂牌上市的公司，经有关证 In a mature stock market, the so-called “exit mechanism” of a listed company means that the listed company will withdraw from the market when the following situations occur: First, when the listed company loses the investment value due to the deteriorating operating conditions, In compliance with the listing conditions of the stock exchange, the exchange can declare the delisting of the company; second, the original listing in a number of stock exchange companies, the relevant permit