Ingdan, Inc. (HKG:400) shares have continued their recent momentum with a 29% gain in the last month alone. The last month tops off a massive increase of 129% in the last year.

After such a large jump in price, Ingdan may be sending very bearish signals at the moment with a price-to-earnings (or "P/E") ratio of 19.1x, since almost half of all companies in Hong Kong have P/E ratios under 12x and even P/E's lower than 7x are not unusual. However, the P/E might be quite high for a reason and it requires further investigation to determine if it's justified.

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For example, consider that Ingdan's financial performance has been poor lately as its earnings have been in decline. 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.

View our latest analysis for Ingdan

Although there are no analyst estimates available for Ingdan, take a look at this free data-rich visualisation to see how the company stacks up on earnings, revenue and cash flow.

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

The only time you'd be truly comfortable seeing a P/E as steep as Ingdan's is when the company's growth is on track to outshine the market decidedly.

Retrospectively, the last year delivered a frustrating 10.0% 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 46% in total over the last three years. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

Comparing that to the market, which is predicted to deliver 21% growth in the next 12 months, the company's downward momentum based on recent medium-term earnings results is a sobering picture.

With this information, we find it concerning that Ingdan is trading at a P/E higher than the market. It seems most investors are ignoring the recent poor growth rate and are hoping for a turnaround in the company's business prospects. 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.

What We Can Learn From Ingdan's P/E?

Shares in Ingdan have built up some good momentum lately, which has really inflated its P/E. 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 Ingdan currently trades on a much higher than expected P/E since its recent earnings have been in decline over the medium-term. When we see earnings heading backwards and underperforming the market forecasts, we suspect the share price is at risk of declining, sending the high P/E lower. 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 1 warning sign for Ingdan that we have uncovered.

Of course, you might also be able to find a better stock than Ingdan. So you may wish to see this free collection of other companies that have reasonable P/E ratios and have grown earnings strongly.

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