Update: dictionary.com says twice a year... it continues with the definition with every two years: Biennial. In Britain, it seems, it might mean both... but in the U.S. biannual means twice a year.
We're talking about the price-to-earnings, or P/E, ratio. The current 12-month forward P/E ratio is 16.8, FactSet's John Butters said on Friday. This P/E ratio is above the 5-year average (13.8) and the 10-year average (14.1).. But just because stocks are expensive relative to their long-term average is no guarantee that prices are doomed to fall immediately.
What is the 'Price-Earnings Ratio - P/E Ratio'. The price-earnings ratio (P/E Ratio) is the ratio for valuing a company that measures its current share price relative to its per-share earnings. The price-earnings ratio can be calculated as: Market Value per Share / Earnings per Share. For example, suppose that a company is currently trading at $43 a share and its earnings over the last 12 months were $1.95 per share. The P/E ratio for the stock could then be calculated as 43/1.95, or 22.05.