Yes, they are both useful and relevant when used in combination but alone stock price is pretty meaningless. Before Berkshire Hathaway issued a stock split (1

Yes, they are both useful and relevant when used in combination but alone stock price is pretty meaningless. Before Berkshire Hathaway issued a stock split (1 share becomes 2 or more shares) a share was worth ~$172,000. Today Apple trades at $520 and MSFT at $38. Alone those numbers are of no use. You don't know how much the actual company is worth. Share price * share volume = Market Cap. You need to know at least two of those values to make an informed decision.