Kopin Corporation (NASDAQ:KOPN) shares have continued their recent momentum with a 33% gain in the last month alone. The last month tops off a massive increase of 120% in the last year.

After such a large jump in price, Kopin may be sending strong sell signals at present with a price-to-sales (or "P/S") ratio of 6.7x, when you consider almost half of the companies in the Semiconductor industry in the United States have P/S ratios under 4x and even P/S lower than 1.7x aren't out of the ordinary. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the highly elevated P/S.

What Does Kopin's P/S Mean For Shareholders?

Kopin hasn't been tracking well recently as its declining revenue compares poorly to other companies, which have seen some growth in their revenues on average. Perhaps the market is expecting the poor revenue to reverse, justifying it's current high P/S.. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

Do Revenue Forecasts Match The High P/S Ratio?

Kopin's 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.

Taking a look back first, the company's revenue growth last year wasn't something to get excited about as it posted a disappointing decline of 9.0%. That put a dampener on the good run it was having over the longer-term as its three-year revenue growth is still a noteworthy 26% in total. So we can start by confirming that the company has generally done a good job of growing revenue over that time, even though it had some hiccups along the way.

Shifting to the future, estimates from the three analysts covering the company suggest revenue should grow by 3.8% over the next year. With the industry predicted to deliver 45% growth, the company is positioned for a weaker revenue result.

With this information, we find it concerning that Kopin is trading at a P/S higher than the industry. It seems most investors are hoping for a turnaround in the company's business prospects, but the analyst cohort is not so confident this will happen. Only the boldest would assume these prices are sustainable as this level of revenue growth is likely to weigh heavily on the share price eventually.

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

Shares in Kopin have seen a strong upwards swing lately, which has really helped boost its P/S figure. Generally, our preference is to limit the use of the price-to-sales ratio to establishing what the market thinks about the overall health of a company.

It comes as a surprise to see Kopin trade at such a high P/S given the revenue forecasts look less than stellar. The weakness in the company's revenue estimate doesn't bode well for the elevated P/S, which could take a fall if the revenue sentiment doesn't improve. At these price levels, investors should remain cautious, particularly if things don't improve.

You always need to take note of risks, for example - Kopin has 3 warning signs we think you should be aware of.

If companies with solid past earnings growth is up your alley, you may wish to see this free collection of other companies with strong earnings growth and low P/E ratios.

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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.