Centralized bidding transaction is a trading method of securities trading in stock exchange. At present, both Shanghai Stock Exchange and Shenzhen Stock Exchange adopt this trading method. Generally speaking, it refers to the situation that two or more buyers and two or more sellers determine the buying and selling prices of securities through public bidding. In this form, there is competition between buyers and sellers, and there are more people on both sides. In centralized bidding, when the highest quotation of the buyer's personnel is consistent with the lowest quotation of the seller's personnel, the transaction price of the securities has been determined and the transaction can be reached.

Centralized bidding transactions can be divided into oral bidding transactions, written bidding transactions and computer bidding transactions.

Centralized bidding includes call auction and continuous bidding, which is different from call auction.

Among them, the Shanghai Stock Exchange stipulates that the opening price shall be obtained by call auction method from 9: 05 to 9: 25, and the Shenzhen Stock Exchange stipulates that the continuous bidding method shall be adopted from 9: 30 to1:30, 13: 00 to 15: 00.

Shanghai Stock Exchange is one of the two stock exchanges in Chinese mainland, located in Pudong New Area. Shanghai Stock Exchange was established on 1990,165438+1October 26th, and officially opened on February 9th of the same year. By the end of 2009, there were 870 listed companies in Shanghai Stock Exchange, with listed securities of 135 1 and total stock market value of 1846523 million yuan. A large number of pillar enterprises, backbone enterprises, basic industrial enterprises and high-tech enterprises in the national economy have raised development funds through listing and changed their operating mechanisms.