What is “pre-market” and “post-market” in stock exchange? Why do stocks change their prices outside of trading hours?
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The stock market hours aren’t its real hours. You can actually trade outside the hours its officially “open”, this is called pre-market (before its official open) and post-market (after its official closed).
However, there is not many people trading during that time, so executing trades can be difficult as you need a buyer and a seller for each trade
The vast majority of pre/post market trading is done by investment/financial firms/companies and such, not by retail traders or “regular” people, who rarely interact with the market outside of normal hours
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