GSE Systems, Inc. (NASDAQ:GVP) shares have had a really impressive month, gaining 35% after a shaky period beforehand. But the last month did very little to improve the 57% share price decline over the last year.

Although its price has surged higher, GSE Systems may still look like a strong buying opportunity at present with its price-to-sales (or "P/S") ratio of 0.2x, considering almost half of all companies in the Software industry in the United States have P/S ratios greater than 4.3x and even P/S higher than 11x aren't out of the ordinary. Although, it's not wise to just take the P/S at face value as there may be an explanation why it's so limited.

What Does GSE Systems' Recent Performance Look Like?

For instance, GSE Systems' receding revenue in recent times would have to be some food for thought. One possibility is that the P/S is low because investors think the company won't do enough to avoid underperforming the broader industry in the near future. If you like the company, you'd be hoping this isn't the case so that you could potentially pick up some stock while it's out of favour.

Do Revenue Forecasts Match The Low P/S Ratio?

There's an inherent assumption that a company should far underperform the industry for P/S ratios like GSE Systems' to be considered reasonable.

In reviewing the last year of financials, we were disheartened to see the company's revenues fell to the tune of 5.6%. This means it has also seen a slide in revenue over the longer-term as revenue is down 22% in total over the last three years. So unfortunately, we have to acknowledge that the company has not done a great job of growing revenue over that time.

Comparing that to the industry, which is predicted to deliver 15% growth in the next 12 months, the company's downward momentum based on recent medium-term revenue results is a sobering picture.

With this in mind, we understand why GSE Systems' P/S is lower than most of its industry peers. However, we think shrinking revenues are unlikely to lead to a stable P/S over the longer term, which could set up shareholders for future disappointment. There's potential for the P/S to fall to even lower levels if the company doesn't improve its top-line growth.

The Bottom Line On GSE Systems' P/S

GSE Systems' recent share price jump still sees fails to bring its P/S alongside the industry median. Using the price-to-sales ratio alone to determine if you should sell your stock isn't sensible, however it can be a practical guide to the company's future prospects.

As we suspected, our examination of GSE Systems revealed its shrinking revenue over the medium-term is contributing to its low P/S, given the industry is set to grow. At this stage investors feel the potential for an improvement in revenue isn't great enough to justify a higher P/S ratio. Given the current circumstances, it seems unlikely that the share price will experience any significant movement in either direction in the near future if recent medium-term revenue trends persist.

You need to take note of risks, for example - GSE Systems has 4 warning signs (and 3 which don't sit too well with us) we think you should know about.

Of course, profitable companies with a history of great earnings growth are generally safer bets. So you may wish to see this free collection of other companies that have reasonable P/E ratios and have grown earnings strongly.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.