Despite an already strong run, Century Aluminum Company (NASDAQ:CENX) shares have been powering on, with a gain of 26% in the last thirty days. The annual gain comes to 110% following the latest surge, making investors sit up and take notice.

Even after such a large jump in price, Century Aluminum may still be sending buy signals at present with its price-to-sales (or "P/S") ratio of 0.7x, considering almost half of all companies in the Metals and Mining industry in the United States have P/S ratios greater than 1.3x and even P/S higher than 5x 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 limited.

What Does Century Aluminum's P/S Mean For Shareholders?

Century Aluminum could be doing better as its revenue has been going backwards lately while most other companies have been seeing positive revenue growth. It seems that many are expecting the poor revenue performance to persist, which has repressed the P/S ratio. So while you could say the stock is cheap, investors will be looking for improvement before they see it as good value.

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 low as Century Aluminum's is when the company's growth is on track to lag the industry.

Retrospectively, the last year delivered a frustrating 21% decrease to the company's top line. Even so, admirably revenue has lifted 36% in aggregate from three years ago, notwithstanding the last 12 months. 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.

Looking ahead now, revenue is anticipated to climb by 7.1% per annum during the coming three years according to the three analysts following the company. Meanwhile, the rest of the industry is forecast to expand by 9.1% each year, which is not materially different.

With this in consideration, we find it intriguing that Century Aluminum's P/S is lagging behind its industry peers. Apparently some shareholders are doubtful of the forecasts and have been accepting lower selling prices.

The Final Word

Century Aluminum's stock price has surged recently, but its but its P/S still remains modest. Typically, we'd caution against reading too much into price-to-sales ratios when settling on investment decisions, though it can reveal plenty about what other market participants think about the company.

It looks to us like the P/S figures for Century Aluminum remain low despite growth that is expected to be in line with other companies in the industry. Despite average revenue growth estimates, there could be some unobserved threats keeping the P/S low. However, if you agree with the analysts' forecasts, you may be able to pick up the stock at an attractive price.

A lot of potential risks can sit within a company's balance sheet. Take a look at our free balance sheet analysis for Century Aluminum with six simple checks on some of these key factors.

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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