Solomon Systech (International) Limited (HKG:2878) shares have had a really impressive month, gaining 27% after a shaky period beforehand. Unfortunately, despite the strong performance over the last month, the full year gain of 2.9% isn't as attractive.

In spite of the firm bounce in price, there still wouldn't be many who think Solomon Systech (International)'s price-to-earnings (or "P/E") ratio of 8.2x is worth a mention when the median P/E in Hong Kong is similar at about 9x. Although, it's not wise to simply ignore the P/E without explanation as investors may be disregarding a distinct opportunity or a costly mistake.

For example, consider that Solomon Systech (International)'s financial performance has been poor lately as its earnings have been in decline. It might be that many expect the company to put the disappointing earnings performance behind them over the coming period, which has kept the P/E from falling. If you like the company, you'd at least be hoping this is the case so that you could potentially pick up some stock while it's not quite in favour.

Does Growth Match The P/E?

The only time you'd be comfortable seeing a P/E like Solomon Systech (International)'s is when the company's growth is tracking the market closely.

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 29%. As a result, earnings from three years ago have also fallen 24% overall. 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 21% shows it's an unpleasant look.

In light of this, it's somewhat alarming that Solomon Systech (International)'s P/E sits in line with the majority of other companies. Apparently many investors in the company are way less bearish than recent times would indicate and aren't willing to let go of their stock right now. 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 the recent negative growth rates.

The Key Takeaway

Its shares have lifted substantially and now Solomon Systech (International)'s P/E is also back up to the market median. 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.

We've established that Solomon Systech (International) currently trades on a 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 moderate P/E lower. If recent medium-term earnings trends continue, it will place shareholders' investments at risk and potential investors in danger of paying an unnecessary premium.

A lot of potential risks can sit within a company's balance sheet. Our free balance sheet analysis for Solomon Systech (International) with six simple checks will allow you to discover any risks that could be an issue.

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.