What is Stock?
A stock is a piece of ownership in a company. When you own stock, you own a small slice of that business and its future, including the chance that it grows in value and the chance that it falls. Stocks are bought and sold on exchanges, and their prices move as buyers and sellers change their minds about what a company is worth.
Why Stock matters
Stocks are the most common building block of a portfolio, so understanding what one is comes first.
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