Shares of iRobot (Nasdaq: IRBT) hit a 52-week low Friday. Let's take a look at how the company got there to find out whether cloudy skies remain on the horizon.

How it got here
One big dent in iRobot's armor came after it released disappointing forward guidance for 2012. Investors have been wary of the robot maker since then, although the trend over the past two months isn't much different than many of its defense peers:

IRBT Total Return Price Chart

IRBT Total Return Price data by YCharts

It's important to remember, though, that iRobot is a much smaller company than most defense-oriented manufacturers. It takes Boeing (NYSE: BA) about two days to earn the revenue iRobot generates in a full year, and it (along with the other notable competitors) has a much more diversified military product lineup.

iRobot's defense backlog also dwindled in 2012, which was an ominous sign for shareholders. Anyone following America's ongoing conflicts shouldn't be surprised. The war effort is effectively over in Iraq and winding down in Afghanistan, and the military's favored patrol 'bots now seem to be of the aerial variety.

What you need to know
Despite the big drop, iRobot still commands a higher valuation than its peers, although its net margin is right in line with most of them:


P/E Ratio

3-Year Annualized Earnings Growth

Net Margin (TTM)

iRobot 16.7 123.9% 7.3%
Boeing 11.6 28.1% 6.0%
Lockheed Martin (NYSE: LMT) 9.7 (4.0%) 5.9%
General Dynamics (NYSE: GD) 9.2 (0.1)% 7.6%
Northrop Grumman (NYSE: NOC) 7.5 5.5% 8.1%

Source: Yahoo! Finance, S&P Capital IQ.

The company's first-quarter earnings barely avoided going negative, and full-year numbers might still wind up splashed with red ink, as guidance projected in the fourth quarter. It may be iRobot's Roomba-led consumer segment keeping it afloat, since the broader defense sector has some valuations barely over half of the robot maker's.

Defense contracts were about a third of iRobot's revenue last year and will almost certainly be less this year. That's a lower percentage than its competitors:


Percent of 2011 Revenue From Defense

Boeing 47%
Lockheed Martin 82%*
General Dynamics 69%*
Northrop Grumman 91%

Sources: Corporate 10-K filings. *Does not include international military orders.

Considering the huge defense cuts set for 2013, a lower reliance on Uncle Sam may be the only thing keeping iRobot from shrinking further -- but that may very well happen anyway if a slowdown occurs in the company's key consumer markets. Things don't look very good for iRobot at the moment.

What's next?
Where does iRobot go from here? I wouldn't bet on a big military boost in the near future, so it may be up to the Roombas (and any other nifty robotic helpers the company comes up with) to carry the day. The Motley Fool's CAPS community is still bullish -- or is that bot-ish -- on iRobot. The company earned a four-star rating just after its big drop and has kept that high esteem since. Count me among those bot bulls. I placed an outperform call on iRobot last fall, and plan to keep it for the long term. I do mean long term, since it's hard to see the company making back its losses this year.

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