Amkor Technology, Inc. (NASDAQ:AMKR) shares have continued their recent momentum with a 31% gain in the last month alone. The annual gain comes to 102% following the latest surge, making investors sit up and take notice.

After such a large jump in price, Amkor Technology may be sending very bearish signals at the moment with a price-to-earnings (or "P/E") ratio of 42.9x, since almost half of all companies in the United States have P/E ratios under 19x and even P/E's lower than 11x 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.

Amkor Technology could be doing better as its earnings have been going backwards lately while most other companies have been seeing positive earnings growth. One possibility is that the P/E is high because investors think this poor earnings performance will turn the corner. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

Keen to find out how analysts think Amkor Technology's future stacks up against the industry? In that case, our free report is a great place to start.

Is There Enough Growth For Amkor Technology?

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

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 16%. The last three years don't look nice either as the company has shrunk EPS by 63% in aggregate. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

Looking ahead now, EPS is anticipated to climb by 23% per year during the coming three years according to the nine analysts following the company. Meanwhile, the rest of the market is forecast to only expand by 12% each year, which is noticeably less attractive.

With this information, we can see why Amkor Technology is trading at such a high P/E compared to the market. It seems most investors are expecting this strong future growth and are willing to pay more for the stock.

The Final Word

Shares in Amkor Technology have built up some good momentum lately, which has really inflated its P/E. 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.

As we suspected, our examination of Amkor Technology's analyst forecasts revealed that its superior earnings outlook is contributing to its high P/E. At this stage investors feel the potential for a deterioration in earnings isn't great enough to justify a lower P/E ratio. It's hard to see the share price falling strongly in the near future under these circumstances.

Don't forget that there may be other risks.

Of course, you might find a fantastic investment by looking at a few good candidates. So take a peek at this free list of companies with a strong growth track record, trading on a low P/E.

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.