Even after rising 20% this past week, iRobot (NASDAQ:IRBT) shareholders are still down 86% over the past three years

It is doubtless a positive to see that the iRobot Corporation (NASDAQ:IRBT) share price has gained some 33% in the last three months. But only the myopic could ignore the astounding decline over three years. In that time the share price has melted like a snowball in the desert, down 86%. So it sure is nice to see a bit of an improvement. But the more important question is whether the underlying business can justify a higher price still. We really hope anyone holding through that price crash has a diversified portfolio. Even when you lose money, you don't have to lose the lesson.

While the stock has risen 20% in the past week but long term shareholders are still in the red, let's see what the fundamentals can tell us.

See our latest analysis for iRobot

Because iRobot 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. Shareholders of unprofitable companies usually desire strong revenue growth. That's because fast revenue growth can be easily extrapolated to forecast profits, often of considerable size.

Over the last three years, iRobot's revenue dropped 27% per year. That's definitely a weaker result than most pre-profit companies report. The swift share price decline at an annual compound rate of 23%, reflects this weak fundamental performance. Never forget that loss making companies with falling revenue can and do cause losses for everyday investors. It's worth remembering that investors call buying a steeply falling share price 'catching a falling knife' because it is a dangerous pass time.

You can see below how earnings and revenue have changed over time (discover the exact values by clicking on the image).

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

While the broader market gained around 23% in the last year, iRobot shareholders lost 34%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 13% per year over five years. 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. For example, we've discovered 2 warning signs for iRobot that you should be aware of before investing here.

But note: iRobot 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.