The Samson Holding Ltd. (HKG:531) share price has fared very poorly over the last month, falling by a substantial 25%. The drop over the last 30 days has capped off a tough year for shareholders, with the share price down 44% in that time.

Although its price has dipped substantially, Samson Holding's price-to-earnings (or "P/E") ratio of 12.3x might still make it look like a sell right now compared to the market in Hong Kong, where around half of the companies have P/E ratios below 8x and even P/E's below 4x are quite common. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's as high as it is.

As an illustration, earnings have deteriorated at Samson Holding over the last year, which is not ideal at all. One possibility is that the P/E is high because investors think the company will still do enough to outperform the broader market in the near future. If not, then existing shareholders may be quite nervous about the viability of the share price.

Check out our latest analysis for Samson Holding

Is There Enough Growth For Samson Holding?

There's an inherent assumption that a company should outperform the market for P/E ratios like Samson Holding's to be considered reasonable.

Retrospectively, the last year delivered a frustrating 74% decrease to the company's bottom line. At least EPS has managed not to go completely backwards from three years ago in aggregate, thanks to the earlier period of growth. Accordingly, shareholders probably wouldn't have been overly satisfied with the unstable medium-term growth rates.

Weighing that recent medium-term earnings trajectory against the broader market's one-year forecast for expansion of 23% shows it's noticeably less attractive on an annualised basis.

In light of this, it's alarming that Samson Holding's P/E sits above the majority of other companies. It seems most investors are ignoring the fairly limited recent growth rates and are hoping for a turnaround in the company's business prospects. There's a good chance existing shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with recent growth rates.

The Bottom Line On Samson Holding's P/E

There's still some solid strength behind Samson Holding's P/E, if not its share price lately. Using the price-to-earnings ratio alone to determine if you should sell your stock isn't sensible, however it can be a practical guide to the company's future prospects.

We've established that Samson Holding currently trades on a much higher than expected P/E since its recent three-year growth is lower than the wider market forecast. Right now we are increasingly uncomfortable with the high P/E as this earnings performance isn't likely to support such positive sentiment for long. Unless the recent medium-term conditions improve markedly, it's very challenging to accept these prices as being reasonable.

Having said that, be aware Samson Holding is showing 4 warning signs in our investment analysis, and 1 of those makes us a bit uncomfortable.

If these risks are making you reconsider your opinion on Samson Holding, explore our interactive list of high quality stocks to get an idea of what else is out there.

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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.