Jiangsu Lidao New Materials Co., Ltd. (SHSE:603937) shareholders that were waiting for something to happen have been dealt a blow with a 26% share price drop in the last month. The drop over the last 30 days has capped off a tough year for shareholders, with the share price down 28% in that time.

In spite of the heavy fall in price, Jiangsu Lidao New Materials' price-to-earnings (or "P/E") ratio of 32.6x might still make it look like a sell right now compared to the market in China, where around half of the companies have P/E ratios below 27x and even P/E's below 17x 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 as high as it is.

For instance, Jiangsu Lidao New Materials' receding earnings in recent times would have to be some food for thought. One possibility is that the P/E is high because investors think the company will still do enough to outperform the broader market in the near future. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

How Is Jiangsu Lidao New Materials' Growth Trending?

The only time you'd be truly comfortable seeing a P/E as high as Jiangsu Lidao New Materials' is when the company's growth is on track to outshine the market.

Retrospectively, the last year delivered a frustrating 46% decrease to the company's bottom line. As a result, earnings from three years ago have also fallen 43% overall. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

In contrast to the company, the rest of the market is expected to grow by 42% over the next year, which really puts the company's recent medium-term earnings decline into perspective.

In light of this, it's alarming that Jiangsu Lidao New Materials' 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.

The Final Word

Jiangsu Lidao New Materials' P/E hasn't come down all the way after its stock plunged. It's argued the price-to-earnings ratio is an inferior measure of value within certain industries, but it can be a powerful business sentiment indicator.

Our examination of Jiangsu Lidao New Materials revealed its shrinking earnings over the medium-term aren't impacting its high P/E anywhere near as much as we would have predicted, given the market is set to grow. Right now we are increasingly uncomfortable with the high P/E as this earnings performance is highly unlikely to support such positive sentiment for long. 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 4 warning signs for Jiangsu Lidao New Materials (2 are potentially serious!) 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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