With a price-to-earnings (or "P/E") ratio of 19.8x AIA Group Limited (HKG:1299) may be sending very bearish signals at the moment, given that almost half of all companies in Hong Kong have P/E ratios under 9x and even P/E's lower than 5x 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.

Recent times have been advantageous for AIA Group as its earnings have been rising faster than most other companies. The P/E is probably high because investors think this strong earnings performance will continue. If not, then existing shareholders might be a little nervous about the viability of the share price.

Does Growth Match The High P/E?

In order to justify its P/E ratio, AIA Group would need to produce outstanding growth well in excess of the market.

Taking a look back first, we see that the company grew earnings per share by an impressive 17% last year. However, this wasn't enough as the latest three year period has seen a very unpleasant 30% drop in EPS in aggregate. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

Turning to the outlook, the next three years should generate growth of 25% per year as estimated by the analysts watching the company. Meanwhile, the rest of the market is forecast to only expand by 15% per year, which is noticeably less attractive.

In light of this, it's understandable that AIA Group's P/E sits above the majority of other companies. It seems most investors are expecting this strong future growth and are willing to pay more for the stock.

The Bottom Line On AIA Group's P/E

Using the price-to-earnings ratio alone to determine if you should sell your stock isn't sensible, however it can be a practical guide to the company's future prospects.

As we suspected, our examination of AIA Group's analyst forecasts revealed that its superior earnings outlook is contributing to its high P/E. Right now shareholders are comfortable with the P/E as they are quite confident future earnings aren't under threat. Unless these conditions change, they will continue to provide strong support to the share price.

The company's balance sheet is another key area for risk analysis. Take a look at our free balance sheet analysis for AIA Group with six simple checks on some of these key factors.

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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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.