Nanjing Kangni Mechanical & Electrical Co.,Ltd (SHSE:603111) shareholders would be excited to see that the share price has had a great month, posting a 42% gain and recovering from prior weakness. Looking back a bit further, it's encouraging to see the stock is up 33% in the last year.

Although its price has surged higher, Nanjing Kangni Mechanical & ElectricalLtd's price-to-earnings (or "P/E") ratio of 19.9x might still make it look like a buy right now compared to the market in China, where around half of the companies have P/E ratios above 32x and even P/E's above 58x 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 limited.

Recent times have been quite advantageous for Nanjing Kangni Mechanical & ElectricalLtd as its earnings have been rising very briskly. It might be that many expect the strong earnings performance to degrade substantially, which has repressed the P/E. If that doesn't eventuate, then existing shareholders have reason to be quite optimistic about the future direction of the share price.

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

The only time you'd be truly comfortable seeing a P/E as low as Nanjing Kangni Mechanical & ElectricalLtd's is when the company's growth is on track to lag the market.

Retrospectively, the last year delivered an exceptional 37% gain to the company's bottom line. Despite this strong recent growth, it's still struggling to catch up as its three-year EPS frustratingly shrank by 61% overall. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

In contrast to the company, the rest of the market is expected to grow by 41% over the next year, which really puts the company's recent medium-term earnings decline into perspective.

In light of this, it's understandable that Nanjing Kangni Mechanical & ElectricalLtd's P/E would sit below the majority of other companies. However, we think shrinking earnings are unlikely to lead to a stable P/E over the longer term, which could set up shareholders for future disappointment. Even just maintaining these prices could be difficult to achieve as recent earnings trends are already weighing down the shares.

The Key Takeaway

The latest share price surge wasn't enough to lift Nanjing Kangni Mechanical & ElectricalLtd's P/E close 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.

As we suspected, our examination of Nanjing Kangni Mechanical & ElectricalLtd revealed its shrinking earnings over the medium-term are contributing to its low P/E, given the market is set to grow. Right now shareholders are accepting the low P/E as they concede future earnings probably won't provide any pleasant surprises. Unless the recent medium-term conditions improve, they will continue to form a barrier for the share price around these levels.

The company's balance sheet is another key area for risk analysis. Our free balance sheet analysis for Nanjing Kangni Mechanical & ElectricalLtd with six simple checks will allow you to discover any risks that could be an issue.

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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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.