Before the stock opens on the trading day (9.30), there is also an opening price in call auction time (9: 15-9.25). Investors can bid at this time. In normal trading hours, the price takes priority according to time, while in call auction time, in addition to following these two principles, there is also a maximum transaction principle (that is, the system calculates a price that allows as many traders as possible to make a transaction, which is the price that the seller can accept higher than the bid and the price that the house can accept lower than the bid). According to all the orders at this time, the system will automatically match the 9: 25 transaction according to the above three principles to form the opening price.
If investors predict that the stock price will rise today, most buyers are willing and sellers want higher prices. According to the principle of maximum transaction volume, the system finally sets a price, so that most sellers can close the transaction above the bid, and most buyers can close the transaction below the bid (the number of sellers who finally close the transaction is equal to the purchase volume, and some bids cannot be closed). Because all the bids were high, they finally formed an opening price higher than the previous trading day, so they opened higher.
It's the same with low opening. The opening price (high opening and low opening) depends on the expectation of the stock price by most traders and the bid triggered by the expectation in call auction stage. At the same time, due to the small trading volume in call auction, large funds (bookmakers) may control the trading price through bidding.
The reason why stocks go higher and lower:
1. Stock price trading is divided into call auction and continuous bidding.
2. call auction: At 9: 25 a.m., the trading system of the exchange queues all the commissions in the system according to the principle of price priority and time priority. The buyer's entrustment is arranged from high to low, and the seller's entrustment is arranged from low to high. Then determine the trading price of the tradable stock at one time, and this price is the opening price.
3. Continuous bidding: In call auction, unsold stocks will enter the continuous bidding. From 9: 30, the commissions of all parties are still lined up in the original way, new commissions are constantly inserted, and the transaction price is constantly changing.
4. High opening: It means that the opening price is higher than yesterday's closing price, which only shows that the top buyers in call auction have high prices.
5. Low opening: lower than the closing price of the previous trading day, and higher than the closing price of the previous trading day, which is related to the trading volume at the opening.
This is the result of the game between long and short sides of the market. If you watch it, buy it high. If you don't like it, sell it low. Reaching a balance is the current price. The high opening may be because the market index is good, or it may be that individual stocks have good news to stimulate;
This information does not constitute any investment advice, and investors should not use this information to replace their independent judgment or make decisions only based on this information.