A company's per-share earnings are simply the company's after-tax profit divided by number of outstanding shares.) Even worse, some methods use so-called negative earnings (i. (Earnings by definition are after all taxes etc. Haramis was born in Greece in 1951 and he studied in Greece, USA and in Belgium.Some analysts will exclude one-time gains or losses from a quarterly earnings report when computing this figure, others will include it. The 10 stock is probably a small company with an exciting product with few competitors. Adding to the confusion is the possibility of a late earnings report from a company; computation of a trailing P/E based on incomplete data is rather tricky. Since 2002 he is New Business Development Managing Director at an Investment Bank and the publisher of Copyright ? 2005 I.PE is a much better comparison of the value of a stock than the price. The P/E ratio is commonly used as a tool for determining the value of a stock. At this price, investors are willing to pay 10 for every 1 of last year's earnings. (If a company has been growing at 10% per year over the past five years but has a P/E ratio of 75, then conventional wisdom would say that the shares are expensive.Like other indicators, P/E is best viewed over time, looking for a trend.com.If the trailing P/E is low, investors may be running from the stock and driving its price down, which only makes the stock look cheap. The 100 stock is probably pretty staid - maybe a buggy whip manufacturer. A 10 stock with a PE of 40 is much more "expensive" than a 100 stock with a PE of 6. A company's P/E ratio is computed by dividing the current market price of one share of a company's stock by that company's per-share earnings.)Finally: A stock could have a high trailing-year P/E ratio, but if the earnings rise, at the end of the year it will have a low P/E after the new earnings report is released.