This week we saw the iRobot Corporation (NASDAQ:IRBT) share price climb by 25%. But the last three years have seen a terrible decline. To wit, the share price sky-dived 85% in that time. So it's about time shareholders saw some gains. Of course the real question is whether the business can sustain a turnaround. We really feel for shareholders in this scenario. It's a good reminder of the importance of diversification, and it's worth keeping in mind there's more to life than money, anyway.

The recent uptick of 25% could be a positive sign of things to come, so let's take a look at historical fundamentals.

iRobot isn't currently profitable, so most analysts would look to revenue growth to get an idea of how fast the underlying business is growing. Generally speaking, companies without profits are expected to grow revenue every year, and at a good clip. That's because it's hard to be confident a company will be sustainable if revenue growth is negligible, and it never makes a profit.

Over the last three years, iRobot's revenue dropped 27% per year. That means its revenue trend is very weak compared to other loss making companies. And as you might expect the share price has been weak too, dropping at a rate of 23% per year. We prefer leave it to clowns to try to catch falling knives, like this stock. There is a good reason that investors often describe buying a sharply falling stock price as 'trying to catch a falling knife'. Think about it.

You can see how earnings and revenue have changed over time in the image below (click on the chart to see the exact values).

Balance sheet strength is crucial. It might be well worthwhile taking a look at our free report on how its financial position has changed over time.

A Different Perspective

iRobot shareholders are down 74% for the year, but the market itself is up 28%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 12% over the last half decade. Generally speaking long term share price weakness can be a bad sign, though contrarian investors might want to research the stock in hope of a turnaround. It's always interesting to track share price performance over the longer term. But to understand iRobot better, we need to consider many other factors. Consider risks, for instance. Every company has them, and we've spotted 3 warning signs for iRobot you should know about.

If you would prefer to check out another company -- one with potentially superior financials -- then do not miss this free list of companies that have proven they can 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.