Chengdu Xuguang Electronics Co., Ltd. (SHSE:600353) shareholders are no doubt pleased to see that the share price has bounced 30% in the last month, although it is still struggling to make up recently lost ground. Unfortunately, the gains of the last month did little to right the losses of the last year with the stock still down 15% over that time.

Following the firm bounce in price, Chengdu Xuguang Electronics may be sending very bearish signals at the moment with a price-to-earnings (or "P/E") ratio of 54.5x, since almost half of all companies in China have P/E ratios under 30x and even P/E's lower than 18x are not unusual. However, the P/E might be quite high for a reason and it requires further investigation to determine if it's justified.

Recent times have been quite advantageous for Chengdu Xuguang Electronics as its earnings have been rising very briskly. It seems that many are expecting the strong earnings performance to beat most other companies over the coming period, which has increased investors' willingness to pay up for the stock. If not, then existing shareholders might be a little nervous about the viability of the share price.

How Is Chengdu Xuguang Electronics' Growth Trending?

There's an inherent assumption that a company should far outperform the market for P/E ratios like Chengdu Xuguang Electronics' to be considered reasonable.

If we review the last year of earnings growth, the company posted a terrific increase of 88%. Pleasingly, EPS has also lifted 90% in aggregate from three years ago, thanks to the last 12 months of growth. Accordingly, shareholders would have probably welcomed those medium-term rates of earnings growth.

This is in contrast to the rest of the market, which is expected to grow by 41% over the next year, materially higher than the company's recent medium-term annualised growth rates.

In light of this, it's alarming that Chengdu Xuguang Electronics' P/E sits above the majority of other companies. 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. 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 Chengdu Xuguang Electronics' P/E?

Shares in Chengdu Xuguang Electronics have built up some good momentum lately, which has really inflated its P/E. 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.

Our examination of Chengdu Xuguang 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. When we see weak earnings with slower than market growth, we suspect the share price is at risk of declining, sending the high P/E lower. Unless the recent medium-term conditions improve markedly, it's very challenging to accept these prices as being reasonable.

Before you take the next step, you should know about the 1 warning sign for Chengdu Xuguang Electronics that we have uncovered.

It's important to make sure you look for a great company, not just the first idea you come across. So take a peek at this free list of interesting companies with strong recent earnings growth (and a low P/E).

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