What does Stock mean?

A stock (or "share") is a tiny slice of ownership in a public company — if a company has 1,000,000 shares and you own one, you own one-millionth of it.

A stock (or 'share') is a tiny slice of ownership in a public company. If a company is split into 1,000,000 shares and you own 1, you own one-millionth of it. Stock prices move every second as buyers and sellers agree on a new price.