How to read p/e’s

Article Excerpt

The p/e ratio (the ratio of a stock’s price to its per-share earnings) is one of many handy investing tools. The concept seems straightforward: A high p/e means a stock is expensive, a low one means it’s cheap. If only it was so simple. The problem is with the “e”. Reported earnings are an accounting assessment. Projected earnings are an outsider’s guess. Stocks rise and fall on vastly more information than that. Some investors refuse to buy stocks that trade above a certain p/e, often as low as 20.0-to-1. But all the market’s great successes go through lengthy periods when they trade at much higher p/e’s, often 50.0-to-1 or higher. Other investors zero in on stocks that trade below a certain p/e, say 10.0-to-1. Decades ago, I used to find some great undiscovered bargains that way. But that game ended with the coming of the Internet. Many of today’s low-p/e stocks are problem stocks. Some recover, but others just get worse. The worst thing…