Those holding Zhejiang Realsun Chemical Co.,Ltd. (SZSE:301212) shares would be relieved that the share price has rebounded 32% in the last thirty days, but it needs to keep going to repair the recent damage it has caused to investor portfolios. Not all shareholders will be feeling jubilant, since the share price is still down a very disappointing 43% in the last twelve months.

Even after such a large jump in price, Zhejiang Realsun ChemicalLtd may still be sending bullish signals at the moment with its price-to-earnings (or "P/E") ratio of 21.5x, since almost half of all companies in China have P/E ratios greater than 32x and even P/E's higher than 58x are not unusual. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's limited.

As an illustration, earnings have deteriorated at Zhejiang Realsun ChemicalLtd over the last year, which is not ideal at all. One possibility is that the P/E is low because investors think the company won't do enough to avoid underperforming the broader market in the near future. However, if this doesn't eventuate then existing shareholders may be feeling optimistic about the future direction of the share price.

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

In order to justify its P/E ratio, Zhejiang Realsun ChemicalLtd would need to produce sluggish growth that's trailing the market.

Taking a look back first, the company's earnings per share growth last year wasn't something to get excited about as it posted a disappointing decline of 42%. The last three years don't look nice either as the company has shrunk EPS by 12% in aggregate. Therefore, it's fair to say the earnings growth recently has been undesirable for the company.

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 Zhejiang Realsun ChemicalLtd'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. There's potential for the P/E to fall to even lower levels if the company doesn't improve its profitability.

The Final Word

Despite Zhejiang Realsun ChemicalLtd's shares building up a head of steam, its P/E still lags most other companies. We'd say the price-to-earnings ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

We've established that Zhejiang Realsun ChemicalLtd maintains its low P/E on the weakness of its sliding earnings over the medium-term, as expected. Right now shareholders are accepting the low P/E as they concede future earnings probably won't provide any pleasant surprises. If recent medium-term earnings trends continue, it's hard to see the share price moving strongly in either direction in the near future under these circumstances.

Having said that, be aware Zhejiang Realsun ChemicalLtd is showing 2 warning signs in our investment analysis, and 1 of those shouldn't be ignored.

If P/E ratios interest you, you may wish to see this free collection of other companies with strong earnings growth and low P/E ratios.

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