Within one day, the stocks you bought cannot be sold. But if you owned a stock the day before, you can still buy it back today after you sell it, and you can't sell it today after you buy it back.

after the closing of individual stocks, trading centers, clearing companies and securities companies begin to settle accounts. Usually, the settlement can be finished that night, and the stock market can be traded again the next day.

so it is also called t+1 trading. T is the abbreviation of today, which means today.

t+3 refers to the business completed today, and it has been processed after three stock trading days. These will be used in the delivery of B shares in the stock market, subscription of new shares and so on. General A-share trading will not be used.

China's A-shares and B-shares are all T+1, so the stocks bought on the same day can only be sold on the next stock trading day, which means they can be traded once a day.

for the stocks sold on the same day, you can buy them back on the same day, which means you can trade them at most twice a day.

However, for index funds or stock index futures, it is slightly more complicated, because its T+ revolving trading generally requires a large amount of funds (generally requires millions of assets), and for all warrants, T+ trading can be used.

if there are _ rooms and counterparties, it is theoretically possible to buy and sell many times a day.

Best trading room for individual stocks:

1. The best time to sell stocks in the morning is when the market starts to skyrocket and around 11: ? The stock market will be sold before 1 o'clock when it opens higher, and will be sold after it rebounds when it opens lower.

2. The best time to buy in the morning is when the stock market opens lower and around 1: -1: 3 in the morning.

3. The best time to buy in the afternoon is 2: -2: 3.

4. The best time to sell at noon is 13: 1-13: 3.