Chengdu Tianjian Technology Co., Ltd. (SZSE:002977) shareholders that were waiting for something to happen have been dealt a blow with a 30% 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 25% in that time.

Even after such a large drop in price, Chengdu Tianjian Technology's price-to-earnings (or "P/E") ratio of 57.2x might still make it look like a strong sell right now compared to the market in China, where around half of the companies have P/E ratios below 29x and even P/E's below 18x 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 so lofty.

For example, consider that Chengdu Tianjian Technology's financial performance has been poor lately as its earnings have been in decline. 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.

View our latest analysis for Chengdu Tianjian Technology

How Is Chengdu Tianjian Technology's Growth Trending?

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

Retrospectively, the last year delivered a frustrating 40% decrease to the company's bottom line. The last three years don't look nice either as the company has shrunk EPS by 50% in aggregate. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

Comparing that to the market, which is predicted to deliver 42% growth in the next 12 months, the company's downward momentum based on recent medium-term earnings results is a sobering picture.

With this information, we find it concerning that Chengdu Tianjian Technology is trading at a P/E higher than the market. 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. Only the boldest would assume these prices are sustainable as a continuation of recent earnings trends is likely to weigh heavily on the share price eventually.

The Key Takeaway

A significant share price dive has done very little to deflate Chengdu Tianjian Technology's very lofty P/E. 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.

Our examination of Chengdu Tianjian Technology 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. Right now we are increasingly uncomfortable with the high P/E as this earnings performance is highly unlikely to support such positive sentiment for long. 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.

Having said that, be aware Chengdu Tianjian Technology is showing 3 warning signs in our investment analysis, and 1 of those is potentially serious.

Of course, you might also be able to find a better stock than Chengdu Tianjian Technology. 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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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.