When close to half the companies in the Communications industry in the United States have price-to-sales ratios (or "P/S") below 1.1x, you may consider Calix, Inc. (NYSE:CALX) as a stock to potentially avoid with its 2.4x P/S ratio. Although, it's not wise to just take the P/S at face value as there may be an explanation why it's as high as it is.

How Has Calix Performed Recently?

While the industry has experienced revenue growth lately, Calix's revenue has gone into reverse gear, which is not great. One possibility is that the P/S ratio is high because investors think this poor revenue performance will turn the corner. If not, then existing shareholders may be extremely nervous about the viability of the share price.

Want the full picture on analyst estimates for the company? Then our free report on Calix will help you uncover what's on the horizon.

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

In order to justify its P/S ratio, Calix would need to produce impressive growth in excess of the industry.

In reviewing the last year of financials, we were disheartened to see the company's revenues fell to the tune of 3.8%. However, a few very strong years before that means that it was still able to grow revenue by an impressive 46% in total over the last three years. Although it's been a bumpy ride, it's still fair to say the revenue growth recently has been more than adequate for the company.

Turning to the outlook, the next year should bring diminished returns, with revenue decreasing 11% as estimated by the seven analysts watching the company. With the industry predicted to deliver 7.9% growth, that's a disappointing outcome.

In light of this, it's alarming that Calix's 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.

What Does Calix's P/S Mean For Investors?

While the price-to-sales ratio shouldn't be the defining factor in whether you buy a stock or not, it's quite a capable barometer of revenue expectations.

We've established that Calix currently trades on a much higher than expected P/S for a company whose revenues are forecast to decline. Right now we aren't comfortable with the high P/S as the predicted future revenue decline likely to impact the positive sentiment that's propping up the P/S. This places shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

Before you take the next step, you should know about the 1 warning sign for Calix that we have uncovered.

If you're unsure about the strength of Calix's business, why not explore our interactive list of stocks with solid business fundamentals for some other companies you may have missed.

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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.