[quantgenius]

In the US the stock market officially opens at 9:30 and closes at 16:00 NY time every day. The day return is the return from the first trade (the official opening price but it would take too long to explain the the difference) at or after 9:30 to the last trade at or before 16:00 (the official closing price) and the night return is the return from the closing price to the opening price the next trading day.

[MuffinFlavored]

premarket 7am NY to 9:29am NY

regular market ends 3:59:59pm NY

post market starts 4:00pm NY, ends 8:00pm NY

correct?

8pm to 7am there’s no way to trade something like SPY and to be honest as a retail investor, can i even buy pre/post market on like, fidelity?

[yareally]

You can trade SPX (which is what SPY is based on) via IBKR after hours. SPX is only options though. They may have extended that to SPY as well now though, since SPY now has daily expiring options.

There's also S&P (ES), NASDAQ (NQ) and other futures. They trade 23/6, closing at 5pm EST on Friday and reopen on Sunday at 6pm EST. Otherwise, they're trading 23 hours a day, except between 5pm and 6pm EST Mon-Fri