The worst result, after buying shares in a company (assuming no leverage), would be if you lose all the money you put in. But when you pick a company that is really flourishing, you can make more than 100%. Long term ITM Power Plc (LON:ITM) shareholders would be well aware of this, since the stock is up 165% in five years. On top of that, the share price is up 10% in about a quarter.

Now it's worth having a look at the company's fundamentals too, because that will help us determine if the long term shareholder return has matched the performance of the underlying business.

See our latest analysis for ITM Power

Because ITM Power made a loss in the last twelve months, we think the market is probably more focussed on revenue and revenue growth, at least for now. Generally speaking, companies without profits are expected to grow revenue every year, and at a good clip. Some companies are willing to postpone profitability to grow revenue faster, but in that case one does expect good top-line growth.

For the last half decade, ITM Power can boast revenue growth at a rate of 12% per year. That's a fairly respectable growth rate. Broadly speaking, this solid progress may well be reflected by the healthy share price gain of 22% per year over five years. Given that the business has made good progress on the top line, it would be worth taking a look at the growth trend. When a growth trend accelerates, be it in revenue or earnings, it can indicate an inflection point for the business, which is can often be an opportunity for investors.

The image below shows how earnings and revenue have tracked over time (if you click on the image you can see greater detail).

ITM Power is a well known stock, with plenty of analyst coverage, suggesting some visibility into future growth. If you are thinking of buying or selling ITM Power stock, you should check out this free report showing analyst consensus estimates for future profits.

A Different Perspective

While the broader market gained around 4.1% in the last year, ITM Power shareholders lost 36%. 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 22%, 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. While it is well worth considering the different impacts that market conditions can have on the share price, there are other factors that are even more important. Consider for instance, the ever-present spectre of investment risk. We've identified 2 warning signs with ITM Power , and understanding them should be part of your investment process.

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 British 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.