Before making investments, one has to evaluate it. For valuating stocks, comes the investment valuation ratio which is the P/E ratio. As a value investor fundamental metrics will be the first priority to value a stock. For calculating P/E certain circumstances may be informative & in some cases it is quite difficult.
Fundamental benchmarking of any stock is about assessment of the Relative cost and benefit before making a trading or specially investment decisions. Fundamentals indicate not only the soundness and sustainability of the company and its business over long term but helps evaluate the relative price you are going to pay and relative value or expected payout