There wouldn't be many who think Shutterstock, Inc.'s (NYSE:SSTK) price-to-earnings (or "P/E") ratio of 15.1x is worth a mention when the median P/E in the United States is similar at about 17x. However, investors might be overlooking a clear opportunity or potential setback if there is no rational basis for the P/E.

With its earnings growth in positive territory compared to the declining earnings of most other companies, Shutterstock has been doing quite well of late. One possibility is that the P/E is moderate because investors think the company's earnings will be less resilient moving forward. If not, then existing shareholders have reason to be feeling optimistic about the future direction of the share price.

Check out our latest analysis for Shutterstock

What Are Growth Metrics Telling Us About The P/E?

In order to justify its P/E ratio, Shutterstock would need to produce growth that's similar to the market.

Taking a look back first, we see that the company grew earnings per share by an impressive 39% last year. Pleasingly, EPS has also lifted 135% in aggregate from three years ago, thanks to the last 12 months of growth. Therefore, it's fair to say the earnings growth recently has been superb for the company.

Turning to the outlook, the next three years should generate growth of 7.1% per annum as estimated by the six analysts watching the company. With the market predicted to deliver 13% growth per year, the company is positioned for a weaker earnings result.

With this information, we find it interesting that Shutterstock is trading at a fairly similar P/E to the market. It seems most investors are ignoring the fairly limited growth expectations and are willing to pay up for exposure to the stock. Maintaining these prices will be difficult to achieve as this level of earnings growth is likely to weigh down the shares eventually.

The Bottom Line On Shutterstock's P/E

Typically, we'd caution against reading too much into price-to-earnings ratios when settling on investment decisions, though it can reveal plenty about what other market participants think about the company.

Our examination of Shutterstock's analyst forecasts revealed that its inferior earnings outlook isn't impacting its P/E as much as we would have predicted. When we see a weak earnings outlook with slower than market growth, we suspect the share price is at risk of declining, sending the moderate P/E lower. This places shareholders' investments at risk and potential investors in danger of paying an unnecessary premium.

You should always think about risks. Case in point, we've spotted 1 warning sign for Shutterstock you should be aware of.

You might be able to find a better investment than Shutterstock. If you want a selection of possible candidates, check out this free list of interesting companies that trade on a low P/E (but have proven they can grow earnings).

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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.