stock prices go up and down. people buy and sell stocks. sometimes stock prices go down a lot and people get sad. but usually, stock prices go back up again. when a lot of people buy stocks, the price goes up. when a lot of people sell stocks, the price goes down. sometimes big companies tell us how much money they made and people like to hear this because it helps them decide if they want to buy or sell stocks. when many people buy stocks because of a good report, the stock price might go up. Read from source...

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