Sinoma Energy Conservation Ltd. (SHSE:603126) shareholders won't be pleased to see that the share price has had a very rough month, dropping 26% and undoing the prior period's positive performance. The drop over the last 30 days has capped off a tough year for shareholders, with the share price down 23% in that time.

Although its price has dipped substantially, you could still be forgiven for feeling indifferent about Sinoma Energy Conservation's P/E ratio of 29.1x, since the median price-to-earnings (or "P/E") ratio in China is also close to 30x. While this might not raise any eyebrows, if the P/E ratio is not justified investors could be missing out on a potential opportunity or ignoring looming disappointment.

For instance, Sinoma Energy Conservation's receding earnings in recent times would have to be some food for thought. 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 not, then existing shareholders may be a little nervous about the viability of the share price.

Is There Some Growth For Sinoma Energy Conservation?

In order to justify its P/E ratio, Sinoma Energy Conservation would need to produce growth that's similar to the market.

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 18%. This has soured the latest three-year period, which nevertheless managed to deliver a decent 24% overall rise in EPS. Accordingly, while they would have preferred to keep the run going, shareholders would be roughly satisfied with the medium-term rates of earnings growth.

Comparing that to the market, which is predicted to deliver 41% growth in the next 12 months, the company's momentum is weaker based on recent medium-term annualised earnings results.

With this information, we find it interesting that Sinoma Energy Conservation is trading at a fairly similar P/E to the market. Apparently many investors in the company are less bearish than recent times would indicate and aren't willing to let go of their stock right now. Maintaining these prices will be difficult to achieve as a continuation of recent earnings trends is likely to weigh down the shares eventually.

The Final Word

Sinoma Energy Conservation's plummeting stock price has brought its P/E right back to the rest of the market. Typically, we'd caution against reading too much into price-to-earnings ratios when settling on investment decisions, though it can reveal plenty about what other market participants think about the company.

Our examination of Sinoma Energy Conservation revealed its three-year earnings trends aren't impacting its P/E 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 moderate P/E lower. Unless the recent medium-term conditions improve, it's challenging to accept these prices as being reasonable.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 2 warning signs with Sinoma Energy Conservation (at least 1 which shouldn't be ignored), and understanding these should be part of your investment process.

If you're unsure about the strength of Sinoma Energy Conservation's business, why not explore our interactive list of stocks with solid business fundamentals for some other companies you may have missed.

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