Can anyone explain this to me? I truly am having trouble understanding how we’re able to trade certain securities 24 hours. Is it only trades inside the brokerage with each other? Or are these securities being traded through the entire NYSE? If it is through just the brokerage, wouldn’t the volume be significantly lower compared to NYSE that the price could potentially be extremely volatile/susceptible to extreme movements until 930 when the market opens and the price is diluted back to the broader market price? Additionally, what would any of these movements overnight trading mean in relation to futures? Especially SPY/QQQ?
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