Athens Water Supply and Sewerage Company S.A.'s (ATH:EYDAP) 27% Share Price Surge Not Quite Adding Up

The Athens Water Supply and Sewerage Company S.A. (ATH:EYDAP) share price has done very well over the last month, posting an excellent gain of 27%. Looking back a bit further, it's encouraging to see the stock is up 26% in the last year.

After such a large jump in price, Athens Water Supply and Sewerage may be sending very bearish signals at the moment with a price-to-earnings (or "P/E") ratio of 52.8x, since almost half of all companies in Greece have P/E ratios under 15x and even P/E's lower than 10x 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 so lofty.

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As an illustration, earnings have deteriorated at Athens Water Supply and Sewerage over the last year, which is not ideal at all. It might be that many expect the company to still outplay most other companies over the coming period, which has kept the P/E from collapsing. If not, then existing shareholders may be quite nervous about the viability of the share price.

See our latest analysis for Athens Water Supply and Sewerage

Although there are no analyst estimates available for Athens Water Supply and Sewerage, 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?

Athens Water Supply and Sewerage's P/E ratio would be typical for a company that's expected to deliver very strong growth, and importantly, perform much better than the market.

Retrospectively, the last year delivered a frustrating 28% decrease to the company's bottom line. The last three years don't look nice either as the company has shrunk EPS by 52% 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 13% 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 Athens Water Supply and Sewerage's P/E sits above the majority of other companies. 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.

The Bottom Line On Athens Water Supply and Sewerage's P/E

The strong share price surge has got Athens Water Supply and Sewerage's P/E rushing to great heights as well. Typically, we'd caution against reading too much into price-to-earnings ratios when settling on investment decisions, though it can reveal plenty about what other market participants think about the company.

We've established that Athens Water Supply and Sewerage 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. If recent medium-term earnings trends continue, it will place shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

There are also other vital risk factors to consider before investing and we've discovered 2 warning signs for Athens Water Supply and Sewerage that you should be aware of.

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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.