iRobot (NASDAQ:IRBT) adds US$54m to market cap in the past 7 days, though investors from five years ago are still down 55%

iRobot Corporation (NASDAQ:IRBT) shareholders should be happy to see the share price up 17% in the last month. But that is little comfort to those holding over the last half decade, sitting on a big loss. In fact, the share price has declined rather badly, down some 55% in that time. So we’re not so sure if the recent bounce should be celebrated. However, in the best case scenario (far from fait accompli), this improved performance might be sustained.

Although the past week has been more reassuring for shareholders, they’re still in the red over the last five years, so let’s see if the underlying business has been responsible for the decline.

See our latest analysis for iRobot

In his essay The Superinvestors of Graham-and-Doddsville Warren Buffett described how share prices do not always rationally reflect the value of a business. One way to examine how market sentiment has changed over time is to look at the interaction between a company’s share price and its earnings per share (EPS).

In the last half decade iRobot saw its share price fall as its EPS declined below zero. At present it’s hard to make valid comparisons between EPS and the share price. However, we can say we’d expect to see a falling share price in this scenario.

The image below shows how EPS has tracked over time (if you click on the image you can see greater detail).

Dive deeper into iRobot’s key metrics by checking this interactive graph of iRobot’s earnings, revenue and cash flow.

A Different Perspective

While the broader market lost about 11% in the twelve months, iRobot shareholders did even worse, losing 47%. Having said that, it’s inevitable that some stocks will be oversold in a falling market. The key is to keep your eyes on the fundamental developments. Regrettably, last year’s performance caps off a bad run, with the shareholders facing a total loss of 9% per year over five years. We realise that Baron Rothschild has said investors should “buy when there is blood on the streets”, but we caution that investors should first be sure they are buying a high quality business. You could get a better understanding of iRobot’s growth by checking out this more detailed historical graph of earnings, revenue and cash flow.

Of course iRobot may not be the best stock to buy. So you may wish to see this free collection of growth stocks.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on US 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.