Giga Device Semiconductor Inc. (SHSE:603986) shareholders should be happy to see the share price up 20% in the last quarter. But that doesn't change the fact that the returns over the last three years have been less than pleasing. Truth be told the share price declined 45% in three years and that return, Dear Reader, falls short of what you could have got from passive investing with an index fund.

After losing 8.4% this past week, it's worth investigating the company's fundamentals to see what we can infer from past performance.

In his essay The Superinvestors of Graham-and-Doddsville Warren Buffett described how share prices do not always rationally reflect the value of a business. One imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

During the three years that the share price fell, Giga Device Semiconductor's earnings per share (EPS) dropped by 33% each year. This fall in the EPS is worse than the 18% compound annual share price fall. So the market may not be too worried about the EPS figure, at the moment -- or it may have previously priced some of the drop in. This positive sentiment is also reflected in the generous P/E ratio of 105.62.

The graphic below depicts how EPS has changed over time (unveil the exact values by clicking on the image).

It's probably worth noting that the CEO is paid less than the median at similar sized companies. It's always worth keeping an eye on CEO pay, but a more important question is whether the company will grow earnings throughout the years. This free interactive report on Giga Device Semiconductor's earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

A Different Perspective

Giga Device Semiconductor shareholders are down 9.3% for the year, but the market itself is up 4.1%. Even the share prices of good stocks drop sometimes, but we want to see improvements in the fundamental metrics of a business, before getting too interested. On the bright side, long term shareholders have made money, with a gain of 1.7% 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. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. Even so, be aware that Giga Device Semiconductor is showing 1 warning sign in our investment analysis , you should know about...

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of companies we expect will grow earnings.

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

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.
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.