Price is based on a combination of assets (not all of which have fixed values), future outlook (which can change at any moment and is based on subjective judgements and irrational consumer spending decisions), scarcity of the stock, and even second-to-second manipulations by automatic trading platforms.

You are dividing an absolute quantity based on past performance by a complicated, ever-changing number based in no small part on future predictions and other subjective and human factors, and trying to extract some sort of meaning.

Without a framework in which to evaluate the result that incorporates many, many other factors that are far more interesting, all you've got is a number that assumes the current judgement of the market has some relationship to past performance.