Tecnon Electronics Co., Ltd. (SZSE:300650) shareholders that were waiting for something to happen have been dealt a blow with a 25% share price drop in the last month. The last month has meant the stock is now only up 2.9% during the last year.

Even after such a large drop in price, given close to half the companies in China have price-to-earnings ratios (or "P/E's") below 29x, you may still consider Tecnon Electronics as a stock to avoid entirely with its 77x P/E ratio. However, the P/E might be quite high for a reason and it requires further investigation to determine if it's justified.

For example, consider that Tecnon Electronics' 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. If not, then existing shareholders may be quite nervous about the viability of the share price.

See our latest analysis for Tecnon Electronics

How Is Tecnon Electronics' Growth Trending?

The only time you'd be truly comfortable seeing a P/E as steep as Tecnon Electronics' is when the company's growth is on track to outshine the market decidedly.

Retrospectively, the last year delivered a frustrating 52% decrease to the company's bottom line. However, a few very strong years before that means that it was still able to grow EPS by an impressive 83% in total over the last three years. So we can start by confirming that the company has generally done a very good job of growing earnings over that time, even though it had some hiccups along the way.

Comparing that to the market, which is predicted to deliver 42% 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 concerning that Tecnon Electronics 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. 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.

What We Can Learn From Tecnon Electronics' P/E?

A significant share price dive has done very little to deflate Tecnon Electronics' very lofty P/E. 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 Tecnon Electronics revealed its three-year earnings trends aren't impacting its high P/E anywhere near as much as we would have predicted, given they look worse than current market expectations. 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 Tecnon Electronics is showing 2 warning signs in our investment analysis, you should know about.

If you're unsure about the strength of Tecnon Electronics' business, why not explore our interactive list of stocks with solid business fundamentals for some other companies you may have missed.

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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.