The price-to-earnings ratio, commonly known as the P/E ratio, is one of the most widely used valuation metrics. It is a basic measure used to compare different investments or the same investment over different periods of time, and it’s simple to calculate.
The P/E ratio is most commonly used for a quick comparison between two securities to see how Wall Street values them, with a higher P/E suggesting that future earnings are more likely. Dividing the common stock market share price (numerator) by earnings per share (denominator) produces the ratio. For example, a stock with a market price of $15.00 and earnings of $1.00 per share would have a P/E ratio of 15 (15/1=15).