The price limit system originated from the early foreign securities market. It is a trading system in the securities market to properly limit the fluctuation range of each stock on the same day in order to prevent the price from soaring and plunging, curb excessive speculation. It is stipulated that the maximum fluctuation range of the trading price in a trading day is a few percent of the closing price of the previous trading day. That is, the highest price and lowest price of the day's transaction are stipulated.
In China's A-share market, there are limits on the ups and downs, which are all 10%, that is, the so-called daily limit and daily limit. The increase of 10% is aimed at the stock price of the previous trading day, that is, the stock price will not increase again when it reaches 10% today, and it will be restricted, but it will not affect the transaction. There are also daily limit and daily limit applicable to all domestic A shares. In addition, the stocks listed for the first time on the same day did not have daily limit, and the warrants in the stock market did not have daily limit and daily limit.