The Equillium, Inc. (NASDAQ:EQ) share price has softened a substantial 28% over the previous 30 days, handing back much of the gains the stock has made lately. Looking back over the past twelve months the stock has been a solid performer regardless, with a gain of 12%.

After such a large drop in price, Equillium may look like a strong buying opportunity at present with its price-to-sales (or "P/S") ratio of 0.7x, considering almost half of all companies in the Biotechs industry in the United States have P/S ratios greater than 12.4x and even P/S higher than 69x 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.

Check out our latest analysis for Equillium

How Equillium Has Been Performing

Equillium could be doing better as it's been growing revenue less than most other companies lately. Perhaps the market is expecting the current trend of poor revenue growth to continue, which has kept the P/S suppressed. If you still like the company, you'd be hoping revenue doesn't get any worse and that you could pick up some stock while it's out of favour.

Keen to find out how analysts think Equillium's future stacks up against the industry? In that case, our free report is a great place to start.

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

The only time you'd be truly comfortable seeing a P/S as depressed as Equillium's is when the company's growth is on track to lag the industry decidedly.

Taking a look back first, we see that the company grew revenue by an impressive 26% last year. Still, revenue has barely risen at all from three years ago in total, which is not ideal. Accordingly, shareholders probably wouldn't have been overly satisfied with the unstable medium-term growth rates.

Looking ahead now, revenue is anticipated to slump, contracting by 15% during the coming year according to the four analysts following the company. That's not great when the rest of the industry is expected to grow by 142%.

With this in consideration, we find it intriguing that Equillium's P/S is closely matching its industry peers. Nonetheless, there's no guarantee the P/S has reached a floor yet with revenue going in reverse. Even just maintaining these prices could be difficult to achieve as the weak outlook is weighing down the shares.

What We Can Learn From Equillium's P/S?

Shares in Equillium have plummeted and its P/S has followed suit. It's argued the price-to-sales ratio is an inferior measure of value within certain industries, but it can be a powerful business sentiment indicator.

As we suspected, our examination of Equillium's analyst forecasts revealed that its outlook for shrinking revenue is contributing to its low P/S. At this stage investors feel the potential for an improvement in revenue isn't great enough to justify a higher P/S ratio. Unless these conditions improve, they will continue to form a barrier for the share price around these levels.

We don't want to rain on the parade too much, but we did also find 6 warning signs for Equillium (2 can't be ignored!) that you need to be mindful of.

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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