The Western Securities Co.,Ltd. (SZSE:002673) share price has done very well over the last month, posting an excellent gain of 25%. Taking a wider view, although not as strong as the last month, the full year gain of 20% is also fairly reasonable.

Following the firm bounce in price, Western SecuritiesLtd's price-to-earnings (or "P/E") ratio of 31.9x might make it look like a sell right now compared to the market in China, where around half of the companies have P/E ratios below 28x and even P/E's below 17x 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 as high as it is.

With earnings growth that's exceedingly strong of late, Western SecuritiesLtd has been doing very well. The P/E is probably high because investors think this strong earnings growth will be enough to outperform the broader market in the near future. If not, then existing shareholders might be a little nervous about the viability of the share price.

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

The only time you'd be truly comfortable seeing a P/E as high as Western SecuritiesLtd's is when the company's growth is on track to outshine the market.

If we review the last year of earnings growth, the company posted a terrific increase of 41%. Still, incredibly EPS has fallen 17% in total from three years ago, which is quite disappointing. 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 36% shows it's an unpleasant look.

In light of this, it's alarming that Western SecuritiesLtd'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. 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.

What We Can Learn From Western SecuritiesLtd's P/E?

Western SecuritiesLtd shares have received a push in the right direction, but its P/E is elevated too. 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 Western SecuritiesLtd 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. 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.

The company's balance sheet is another key area for risk analysis. Take a look at our free balance sheet analysis for Western SecuritiesLtd with six simple checks on some of these key factors.

You might be able to find a better investment than Western SecuritiesLtd. If you want a selection of possible candidates, check out this free list of interesting companies that trade on a low P/E (but have proven they can grow earnings).

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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.