Diodes Incorporated (NASDAQ:DIOD) shareholders should be happy to see the share price up 16% in the last month. But that cannot eclipse the less-than-impressive returns over the last three years. Truth be told the share price declined 41% in three years and that return, Dear Reader, falls short of what you could have got from passive investing with an index fund.

Since shareholders are down over the longer term, lets look at the underlying fundamentals over the that time and see if they've been consistent with returns.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. One flawed but reasonable way to assess how sentiment around a company has changed is to compare the earnings per share (EPS) with the share price.

Diodes saw its EPS decline at a compound rate of 32% per year, over the last three years. In comparison the 16% compound annual share price decline isn't as bad as the EPS drop-off. 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 47.47.

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

Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here.

A Different Perspective

Investors in Diodes had a tough year, with a total loss of 20%, against a market gain of about 26%. 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. Longer term investors wouldn't be so upset, since they would have made 3%, each year, over five years. It could be that the recent sell-off is an opportunity, so it may be worth checking the fundamental data for signs of a long term growth trend. It's always interesting to track share price performance over the longer term. But to understand Diodes better, we need to consider many other factors. Even so, be aware that Diodes is showing 1 warning sign in our investment analysis , you should know about...

But note: Diodes may not be the best stock to buy. So take a peek at this free list of interesting companies with past earnings growth (and further growth forecast).

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

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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.