Typically, a company has positive earnings. After all, who wants to invest in a company that is losing money. However, companies do lose money. And when they do, they end up with negative P/E ratios.
A lot of times, negative P/E ratios are disregarded for analysis. But, I think there is a lot that can be learned studying these companies. So, below are the top ten with the most negative P/E ratios in the S&P 500. To be "most" negative, you either need a really high stock price or negative (but fairly small) earnings numbers. So, either way, these are stocks that may not in the best shape in terms of attractive valuation or profitability: