How do stock prices actually change?

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I understand how supply and demand works but I’m confused as to who actually is in charge of setting the price to display to all trading platforms. Since the stock price is constant across all trading platforms, what algorithm or system is in place to ensure there are no clashes or discrepancies between said platforms? Is there one dominating platform that monitors all stock prices which other platforms refer to such as the NYSE?

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Anonymous 0 Comments

The price you see is the price at which the stock changed owner. If there were no trades, then the price wouldn’t show a difference.

There are papers which rarely get traded and for those there are thus rarely price updates. Not like major stocks which get traded constantly

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