Those holding Wuxi Taclink Optoelectronics Technology Co., Ltd. (SHSE:688205) shares would be relieved that the share price has rebounded 27% in the last thirty days, but it needs to keep going to repair the recent damage it has caused to investor portfolios. Unfortunately, the gains of the last month did little to right the losses of the last year with the stock still down 13% over that time.

Since its price has surged higher, Wuxi Taclink Optoelectronics Technology's price-to-earnings (or "P/E") ratio of 52.6x might 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 30x 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.

Wuxi Taclink Optoelectronics Technology has been struggling lately as its earnings have declined faster than most other companies. It might be that many expect the dismal earnings performance to recover substantially, 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.

Does Growth Match The High P/E?

In order to justify its P/E ratio, Wuxi Taclink Optoelectronics Technology would need to produce outstanding growth well in excess of the market.

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 25%. This means it has also seen a slide in earnings over the longer-term as EPS is down 57% in total over the last three years. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

Turning to the outlook, the next year should generate growth of 37% as estimated by the one analyst watching the company. That's shaping up to be materially lower than the 41% growth forecast for the broader market.

In light of this, it's alarming that Wuxi Taclink Optoelectronics Technology's P/E sits above the majority of other companies. It seems most investors are hoping for a turnaround in the company's business prospects, but the analyst cohort is not so confident this will happen. There's a good chance these shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with the growth outlook.

The Final Word

Shares in Wuxi Taclink Optoelectronics Technology have built up some good momentum lately, which has really inflated its P/E. While the price-to-earnings ratio shouldn't be the defining factor in whether you buy a stock or not, it's quite a capable barometer of earnings expectations.

Our examination of Wuxi Taclink Optoelectronics Technology's analyst forecasts revealed that its inferior earnings outlook isn't impacting its high P/E anywhere near as much as we would have predicted. When we see a weak earnings outlook with slower than market growth, we suspect the share price is at risk of declining, sending the high P/E lower. This places shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

There are also other vital risk factors to consider before investing and we've discovered 3 warning signs for Wuxi Taclink Optoelectronics Technology that you should be aware of.

Of course, you might find a fantastic investment by looking at a few good candidates. So take a peek at this free list of companies with a strong growth track record, trading on a low P/E.

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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.