The five-year decline in earnings for Constellium NYSE:CSTM) isn't encouraging, but shareholders are still up 107% over that period

The most you can lose on any stock (assuming you don't use leverage) is 100% of your money. But when you pick a company that is really flourishing, you can make more than 100%. For example, the Constellium SE (NYSE:CSTM) share price has soared 107% in the last half decade. Most would be very happy with that. But it's down 8.9% in the last week.

While the stock has fallen 8.9% this week, it's worth focusing on the longer term and seeing if the stocks historical returns have been driven by the underlying fundamentals.

Check out our latest analysis for Constellium

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.

During five years of share price growth, Constellium actually saw its EPS drop 14% per year.

This means it's unlikely the market is judging the company based on earnings growth. Since the change in EPS doesn't seem to correlate with the change in share price, it's worth taking a look at other metrics.

On the other hand, Constellium's revenue is growing nicely, at a compound rate of 8.2% over the last five years. In that case, the company may be sacrificing current earnings per share to drive growth.

The company's revenue and earnings (over time) are depicted in the image below (click to see the exact numbers).

Take a more thorough look at Constellium's financial health with this free report on its balance sheet.

A Different Perspective

Constellium shareholders have received returns of 24% over twelve months, which isn't far from the general market return. Most would be happy with a gain, and it helps that the year's return is actually better than the average return over five years, which was 16%. It is possible that management foresight will bring growth well into the future, even if the share price slows down. 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. To that end, you should be aware of the 1 warning sign we've spotted with Constellium .

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 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.