The truth is that if you invest for long enough, you're going to end up with some losing stocks. But the long term shareholders of Natural Gas Services Group, Inc. (NYSE:NGS) have had an unfortunate run in the last three years. Sadly for them, the share price is down 61% in that time. The more recent news is of little comfort, with the share price down 34% in a year. Shareholders have had an even rougher run lately, with the share price down 11% in the last 90 days.

Check out our latest analysis for Natural Gas Services Group

To paraphrase Benjamin Graham: Over the short term the market is a voting machine, but over the long term it's a weighing machine. One way to examine how market sentiment has changed over time is to look at the interaction between a company's share price and its earnings per share (EPS).

Over the three years that the share price declined, Natural Gas Services Group's earnings per share (EPS) dropped significantly, falling to a loss. This was, in part, due to extraordinary items impacting earnings. Due to the loss, it's not easy to use EPS as a reliable guide to the business. However, we can say we'd expect to see a falling share price in this scenario.

You can see below how EPS has changed over time (discover the exact values by clicking on the image).

It might be well worthwhile taking a look at our free report on Natural Gas Services Group's earnings, revenue and cash flow.

A Different Perspective

Natural Gas Services Group shareholders are down 34% for the year, but the market itself is up 24%. Even the share prices of good stocks drop sometimes, but we want to see improvements in the fundamental metrics of a business, before getting too interested. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 11% per year over five years. We realise that Buffett has said investors should 'buy when there is blood on the streets', but we caution that investors should first be sure they are buying a high quality business. If you would like to research Natural Gas Services Group in more detail then you might want to take a look at whether insiders have been buying or selling shares in the company.

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of companies we expect will grow earnings.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on US exchanges.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned.

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Thank you for reading.