What is PE Ratio?
The Price-to-Earnings Ratio or P/E ratio is a ratio for valuing a company that measures its current share price relative to its per-share earnings. For example, suppose that a company is currently trading at Rs. 100 a share and its earnings over the last 12 months were Rs. 5 per share. The P/E ratio for the stock could then be calculated as Rs.100/Rs.5, or Rs. 20. EPS is most often derived from the sum of last four quarters. While EPS of a company remains the same for a quarter or a year, the stock market price changes everyday and hence the PE ratio also changes.