What exactly is price/earnings ratio

The price/earning (P/E) ratio has become another measurement that's of particular interest to investors in public businesses. The P/E ratio creates an idea of how much you're paying in our price for stock shares for each dollar of earning. Earnings prop up the marketplace value of stock shares, not the book value of the stock shares that's reported in the balance sheet. 

The P/E ratio is a reality check on just how high the current selling price is in relation to the underlying profit that the business is earning. Extraordinarily high P/E ratios are justified only when investors think that the company's earnings per share (EPS) has a lot of upside potential in the future. 

The P/E ratio is calculated dividing the current market price of the stock by the most recent trailing for a year diluted EPS. Stock share prices bounce around commonplace and are subject to big changes on short notice. The current P/E ratio should be compared with the average stock market P/E to gauge if ever the business selling above or below the marketplace average.

P/E ratios are now running high, despite a four-year slump in the stock market. P/E ratios changes from industry to industry and from year to year. One dollar of EPS may command simply a $10 market value for a mature business in a no-growth industry, while a dollar of EPS in a dynamic business in a growth industry may have a $30 market value per dollar of earnings, or net income. 

To sum up, the price/earnings ratio, or P/E ratio is the present position price of a  capital stock divided by its trailing 12 months' diluted earnings per share (EPS) or its basic earnings per share if the business does not report diluted EPS. Inadequate P/E may signal an underbalued stock or even a pessimistic forecast by investors. A higher P/E may reveal an overvalued stock or might be based on a confident forecast by investors.