Why do many stocks sometimes go up or down simultaneosly?

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I get why a price of an individual stock goes up or down.

What I am trying to understand and I didn’t find on sub either is why some days a whole market can go wildly up or down at the same exact moment.

Is it just many people investing in a particular sector at once or some other factors?

Thank you in advance 🙂

In: Economics

5 Answers

Anonymous 0 Comments

Many factors happens. The usual case because trading between countries. Others from news influence, for example Pfizer success making vaccine, thus Pfizer stock gone up. Or some government policy (example The Feds)

Social media influence can affect market too. Like GME, that caused by subreddit that urges people buy the stock. Or Elon musk that urges sell bitcoin.

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