You may think that with a price-to-sales (or "P/S") ratio of 7x Wave Life Sciences Ltd. (NASDAQ:WVE) is a stock to avoid completely, seeing as almost half of all the Pharmaceuticals companies in the United States have P/S ratios under 3x and even P/S lower than 0.7x 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 lofty.

View our latest analysis for Wave Life Sciences

What Does Wave Life Sciences' Recent Performance Look Like?

Recent times have been advantageous for Wave Life Sciences as its revenues have been rising faster than most other companies. The P/S is probably high because investors think this strong revenue performance will continue. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

What Are Revenue Growth Metrics Telling Us About The High P/S?

Wave Life Sciences' P/S ratio would be typical for a company that's expected to deliver very strong growth, and importantly, perform much better than the industry.

If we review the last year of revenue growth, we see the company's revenues grew exponentially. The amazing performance means it was also able to deliver huge revenue growth over the last three years. Therefore, it's fair to say the revenue growth recently has been superb for the company.

Looking ahead now, revenue is anticipated to slump, contracting by 12% per annum during the coming three years according to the six analysts following the company. That's not great when the rest of the industry is expected to grow by 51% per annum.

In light of this, it's alarming that Wave Life Sciences' P/S sits above the majority of other companies. Apparently many investors in the company reject the analyst cohort's pessimism and aren't willing to let go of their stock at any price. There's a very good chance these shareholders are setting themselves up for future disappointment if the P/S falls to levels more in line with the negative growth outlook.

The Key Takeaway

We'd say the price-to-sales ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

Our examination of Wave Life Sciences' analyst forecasts revealed that its shrinking revenue outlook isn't drawing down its high P/S anywhere near as much as we would have predicted. In cases like this where we see revenue decline on the horizon, we suspect the share price is at risk of following suit, bringing back the high P/S into the realms of suitability. This places shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

There are also other vital risk factors to consider and we've discovered 4 warning signs for Wave Life Sciences (1 can't be ignored!) that you should be aware of before investing here.

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.