NCS Testing Technology Co., Ltd. (SZSE:300797) shareholders that were waiting for something to happen have been dealt a blow with a 26% 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 20% in that time.

In spite of the heavy fall in price, there still wouldn't be many who think NCS Testing Technology's price-to-earnings (or "P/E") ratio of 29.7x is worth a mention when the median P/E in China is similar at about 28x. Although, it's not wise to simply ignore the P/E without explanation as investors may be disregarding a distinct opportunity or a costly mistake.

Recent times have been quite advantageous for NCS Testing Technology as its earnings have been rising very briskly. It might be that many expect the strong earnings performance to wane, which has kept the P/E from rising. If that doesn't eventuate, then existing shareholders have reason to be feeling optimistic about the future direction of the share price.

How Is NCS Testing Technology's Growth Trending?

The only time you'd be comfortable seeing a P/E like NCS Testing Technology's is when the company's growth is tracking the market closely.

Retrospectively, the last year delivered an exceptional 36% gain to the company's bottom line. The latest three year period has also seen an excellent 95% overall rise in EPS, aided by its short-term performance. Therefore, it's fair to say the earnings growth recently has been superb for the company.

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

With this information, we find it interesting that NCS Testing Technology is trading at a fairly similar P/E to the market. It seems most investors are ignoring the fairly limited recent growth rates and are willing to pay up for exposure to the stock. They may be setting themselves up for future disappointment if the P/E falls to levels more in line with recent growth rates.

The Bottom Line On NCS Testing Technology's P/E

Following NCS Testing Technology's share price tumble, its P/E is now hanging on to the median market P/E. We'd say the price-to-earnings ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

Our examination of NCS Testing Technology revealed its three-year earnings trends aren't impacting its P/E as much as we would have predicted, given they look worse than current market expectations. When we see weak earnings with slower than market growth, we suspect the share price is at risk of declining, sending the moderate P/E lower. If recent medium-term earnings trends continue, it will place shareholders' investments at risk and potential investors in danger of paying an unnecessary premium.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 2 warning signs with NCS Testing Technology (at least 1 which can't be ignored), and understanding them should be part of your investment process.

If these risks are making you reconsider your opinion on NCS Testing Technology, 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.