Stock index futures of American stocks, such as the small S&P index and the small Dow Jones Industrial Average, are traded 24 hours a day with only a few short breaks.
Extended data:
Characteristics of US stocks in different trading hours
From 9: 30 to 9: 45, these fifteen minutes are called "spare time", and large institutions usually enter after 9:45. During this period, brokers and market makers will execute customers' liquidation orders, which is one of the most unstable moments of the day.
10: 00 is called the "critical reversal moment". Many economic data will be released at 10, and the market often reverses at this moment.
These two hours (11:30-1:30) are called "lunch time". During this period, the more powerful market makers will go out for lunch and order assistants to do nothing but provide liquidity, so the turnover during this period will be relatively small. It is unlikely that there will be a smooth sailing trend during this period, and the sideways situation is more common.
1:30-4:00 is "professional time", and many institutional investors will choose to enter the market during "professional time". During this period, the most powerful market makers and brokers will continue to execute customers' liquidation orders and trade their company accounts. In addition, it should be noted that 2:30 is another key trading moment, and many strong trends often begin at this time.
At 4 o'clock, the US stock market closed.
Baidu encyclopedia-American stocks