Update: Amkor Technology Stock Gained 67% In The Last Three Years

By buying an index fund, you can roughly match the market return with ease. But if you buy good businesses at attractive prices, your portfolio returns could exceed the average market return. For example, the Amkor Technology, Inc. (NASDAQ:AMKR) share price is up 67% in the last three years, clearly besting than the market return of around 40% (not including dividends).

See our latest analysis for Amkor Technology

While the efficient markets hypothesis continues to be taught by some, it has been proven that markets are over-reactive dynamic systems, and investors are not always rational. By comparing earnings per share (EPS) and share price changes over time, we can get a feel for how investor attitudes to a company have morphed over time.

Amkor Technology was able to grow its EPS at 35% per year over three years, sending the share price higher. This EPS growth is higher than the 19% average annual increase in the share price. Therefore, it seems the market has moderated its expectations for growth, somewhat.

You can see how EPS has changed over time in the image below (click on the chart to see the exact values).

NasdaqGS:AMKR Past and Future Earnings, March 1st 2019
NasdaqGS:AMKR Past and Future Earnings, March 1st 2019

It’s probably worth noting we’ve seen significant insider buying in the last quarter, which we consider a positive. That said, we think earnings and revenue growth trends are even more important factors to consider. Dive deeper into the earnings by checking this interactive graph of Amkor Technology’s earnings, revenue and cash flow.

A Different Perspective

Amkor Technology shareholders are down 16% for the year, but the market itself is up 5.0%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. On the bright side, long term shareholders have made money, with a gain of 7.6% per year over half a decade. If the fundamental data continues to indicate long term sustainable growth, the current sell-off could be an opportunity worth considering. It is all well and good that insiders have been buying shares, but we suggest you check here to see what price insiders were buying at.

Amkor Technology is not the only stock that insiders are buying. For those who like to find winning investments this free list of growing companies with recent insider purchasing, could be just the ticket.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on US exchanges.

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned. Thank you for reading.