Guangdong Sanhe Pile Co., Ltd. (SZSE:003037) shareholders that were waiting for something to happen have been dealt a blow with a 29% share price drop in the last month. The drop over the last 30 days has capped off a tough year for shareholders, with the share price down 36% in that time.

In spite of the heavy fall in price, given close to half the companies in China have price-to-earnings ratios (or "P/E's") below 26x, you may still consider Guangdong Sanhe Pile as a stock to avoid entirely with its 55.6x P/E ratio. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's so lofty.

For example, consider that Guangdong Sanhe Pile's financial performance has been poor lately as its earnings have been in decline. It might be that many expect the company to still outplay most other companies over the coming period, which has kept the P/E from collapsing. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

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

In order to justify its P/E ratio, Guangdong Sanhe Pile would need to produce outstanding growth well in excess of the market.

Taking a look back first, the company's earnings per share growth last year wasn't something to get excited about as it posted a disappointing decline of 42%. This means it has also seen a slide in earnings over the longer-term as EPS is down 79% in total over the last three years. Therefore, it's fair to say the earnings growth recently has been undesirable for the company.

Comparing that to the market, which is predicted to deliver 41% growth in the next 12 months, the company's downward momentum based on recent medium-term earnings results is a sobering picture.

In light of this, it's alarming that Guangdong Sanhe Pile's P/E sits above the majority of other companies. Apparently many investors in the company are way more bullish than recent times would indicate and aren't willing to let go of their stock at any price. There's a very good chance existing shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with the recent negative growth rates.

The Bottom Line On Guangdong Sanhe Pile's P/E

Guangdong Sanhe Pile's shares may have retreated, but its P/E is still flying high. It's argued the price-to-earnings ratio is an inferior measure of value within certain industries, but it can be a powerful business sentiment indicator.

Our examination of Guangdong Sanhe Pile revealed its shrinking earnings over the medium-term aren't impacting its high P/E anywhere near as much as we would have predicted, given the market is set to grow. When we see earnings heading backwards and underperforming the market forecasts, we suspect the share price is at risk of declining, sending the high P/E lower. If recent medium-term earnings trends continue, it will place 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 4 warning signs for Guangdong Sanhe Pile (1 can't be ignored!) that we have uncovered.

You might be able to find a better investment than Guangdong Sanhe Pile. If you want a selection of possible candidates, check out this free list of interesting companies that trade on a low P/E (but have proven they can grow earnings).

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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.