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Apple has an approximately $1.30747 trillion market cap.
Apple currently has a $298.28 share price.
Which means that there are approximately 4,383,364,623 of Apple shares outstanding ($1.30747T / $298.28) = 4,383,364,623
Now imagine for a second there is a scenario where no one wants to sell their shares of Apple stock at $298.28 because they all believe the company has such a wonderful future, but I want to buy 1 share.
So I come along, and I am required to lift the ask by 1 cent, from $298.28 to $298.29 in order to attract a seller to give me 1 share of Apple stock.
By me lifting the ask by 1 cent, my $298.29 single-Apple share purchase has "created" $4,383,364.62 in new wealth cumulatively across all Apple shareholders accounts. (All shares outstanding multiplied by 1 cent).
Once you understand how the implications of this math, a lot of other things will make sense to you, such as why investing "stories" are so important, why CNBC is a matter of national security at this point, the power of buybacks to goose stock prices, etc, etc.