How it works
A stock is a slice of a company, also called a share. Sam cut Lemon Co. into ten equal slices worth 20 coins each.
People who own slices are called shareholders. Sam sold six slices and kept four.
A stock gives two things: a share of the earnings (a payout), and a price that moves with what people expect.
Either can be good one year and weak the next, and neither is promised.