The Sichuan Tianwei Electronic Co.,Ltd. (SHSE:688511) share price has softened a substantial 28% over the previous 30 days, handing back much of the gains the stock has made lately. Instead of being rewarded, shareholders who have already held through the last twelve months are now sitting on a 40% share price drop.

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 34x, you may still consider Sichuan Tianwei ElectronicLtd as a stock to avoid entirely with its 78.5x 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.

As an illustration, earnings have deteriorated at Sichuan Tianwei ElectronicLtd over the last year, which is not ideal at all. 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.

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

Sichuan Tianwei ElectronicLtd's P/E ratio would be typical for a company that's expected to deliver very strong growth, and importantly, perform much better than the market.

Retrospectively, the last year delivered a frustrating 64% decrease to the company's bottom line. The last three years don't look nice either as the company has shrunk EPS by 87% in aggregate. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

Weighing that medium-term earnings trajectory against the broader market's one-year forecast for expansion of 38% shows it's an unpleasant look.

With this information, we find it concerning that Sichuan Tianwei ElectronicLtd is trading at a P/E higher than the market. It seems most investors are ignoring the recent poor growth rate and are hoping for a turnaround in the company's business prospects. 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 Sichuan Tianwei ElectronicLtd's P/E

Sichuan Tianwei ElectronicLtd'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.

We've established that Sichuan Tianwei ElectronicLtd currently trades on a much higher than expected P/E since its recent earnings have been in decline over the medium-term. 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. Unless the recent medium-term conditions improve markedly, it's very challenging to accept these prices as being reasonable.

You should always think about risks. Case in point, we've spotted 5 warning signs for Sichuan Tianwei ElectronicLtd you should be aware of, and 3 of them are a bit concerning.

If P/E ratios interest you, you may wish to see this free collection of other companies with strong earnings growth and low P/E ratios.

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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.