Clean Energy Fuels Corp. (NASDAQ:CLNE) shareholders should be happy to see the share price up 13% in the last quarter. But that doesn't change the fact that the returns over the last three years have been stomach churning. Indeed, the share price is down a whopping 74% in the last three years. Arguably, the recent bounce is to be expected after such a bad drop. Only time will tell if the company can sustain the turnaround.

Given the past week has been tough on shareholders, let's investigate the fundamentals and see what we can learn.

Clean Energy Fuels isn't currently profitable, so most analysts would look to revenue growth to get an idea of how fast the underlying business is growing. When a company doesn't make profits, we'd generally hope to see good revenue growth. As you can imagine, fast revenue growth, when maintained, often leads to fast profit growth.

In the last three years, Clean Energy Fuels saw its revenue grow by 22% per year, compound. That is faster than most pre-profit companies. So on the face of it we're really surprised to see the share price down 20% a year in the same time period. You'd want to take a close look at the balance sheet, as well as the losses. Ultimately, revenue growth doesn't amount to much if the business can't scale well. If the company is low on cash, it may have to raise capital soon.

The graphic below depicts how earnings and revenue have 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. So it makes a lot of sense to check out what analysts think Clean Energy Fuels will earn in the future (free profit forecasts).

A Different Perspective

Clean Energy Fuels shareholders are down 36% for the year, but the market itself is up 23%. 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 1.4%, each year, over five years. 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. Case in point: We've spotted 1 warning sign for Clean Energy Fuels you should be aware of.

If you are like me, then you will not want to miss this free list of undervalued small caps that insiders are buying.

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.

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