Sunshine Global Circuits Co.,Ltd. (SZSE:300739) shareholders are no doubt pleased to see that the share price has bounced 25% in the last month, although it is still struggling to make up recently lost ground. While recent buyers may be laughing, long-term holders might not be as pleased since the recent gain only brings the stock back to where it started a year ago.

After such a large jump in price, Sunshine Global CircuitsLtd's price-to-earnings (or "P/E") ratio of 49.3x 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 29x and even P/E's below 18x are quite common. 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 Sunshine Global CircuitsLtd's 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. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

Is There Enough Growth For Sunshine Global CircuitsLtd?

In order to justify its P/E ratio, Sunshine Global CircuitsLtd 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 46%. This means it has also seen a slide in earnings over the longer-term as EPS is down 30% 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.

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

In light of this, it's alarming that Sunshine Global CircuitsLtd's P/E sits above the majority of other companies. It seems most investors are ignoring the recent poor growth rate and are hoping for a turnaround in the company's business prospects. 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.

What We Can Learn From Sunshine Global CircuitsLtd's P/E?

Sunshine Global CircuitsLtd's P/E is flying high just like its stock has during the last month. 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.

We've established that Sunshine Global CircuitsLtd currently trades on a much higher than expected P/E since its recent earnings have been in decline over the medium-term. When we see earnings heading backwards and underperforming the market forecasts, we suspect the share price is at risk of declining, sending the high P/E lower. 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.

Before you settle on your opinion, we've discovered 4 warning signs for Sunshine Global CircuitsLtd (1 makes us a bit uncomfortable!) that you should be aware of.

If these risks are making you reconsider your opinion on Sunshine Global CircuitsLtd, 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.