Meter Instruments Co., Ltd. (SZSE:301006) shareholders would be excited to see that the share price has had a great month, posting a 30% gain and recovering from prior weakness. Unfortunately, the gains of the last month did little to right the losses of the last year with the stock still down 33% over that time.

Although its price has surged higher, Meter Instruments may still be sending bullish signals at the moment with its price-to-earnings (or "P/E") ratio of 23x, since almost half of all companies in China have P/E ratios greater than 27x and even P/E's higher than 51x are not unusual. However, the P/E might be low for a reason and it requires further investigation to determine if it's justified.

For example, consider that Meter Instruments' financial performance has been poor lately as its earnings have been in decline. It might be that many expect the disappointing earnings performance to continue or accelerate, which has repressed the P/E. 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, Meter Instruments would need to produce sluggish growth that's trailing the market.

Retrospectively, the last year delivered a frustrating 55% decrease to the company's bottom line. This means it has also seen a slide in earnings over the longer-term as EPS is down 66% in total over the last three years. Therefore, it's fair to say the earnings growth recently has been undesirable for the company.

Comparing that to the market, which is predicted to deliver 36% growth in the next 12 months, the company's downward momentum based on recent medium-term earnings results is a sobering picture.

In light of this, it's understandable that Meter Instruments' 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.

What We Can Learn From Meter Instruments' P/E?

Meter Instruments' stock might have been given a solid boost, but its P/E certainly hasn't reached any great heights. Generally, our preference is to limit the use of the price-to-earnings ratio to establishing what the market thinks about the overall health of a company.

As we suspected, our examination of Meter Instruments revealed its shrinking earnings over the medium-term are contributing to its low P/E, given the market is set to grow. At this stage investors feel the potential for an improvement in earnings isn't great enough to justify a higher P/E ratio. 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.

Before you take the next step, you should know about the 2 warning signs for Meter Instruments (1 is a bit concerning!) that we have uncovered.

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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