Based on the aggregated intelligence of 170,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, wireless communication tower operator American Tower (NYSE: AMT) has earned a respected four-star ranking.

With that in mind, let's take a closer look at American Tower's business and see what CAPS investors are saying about the stock right now.

American Tower facts

Headquarters (Founded) Boston (1995)
Market Cap $20.25 billion
Industry Wireless telecommunication services
Trailing-12-Month Revenue $1.89 billion
Management

Chairman/CEO James Taiclet Jr.

CFO Thomas Bartlett
Return on Equity (Average, Past 3 Years) 8%
Cash/Debt $414.6 million / $4.8 billion
Competitors

Crown Castle International (NYSE: CCI)

SBA Communications (Nasdaq: SBAC)

Sources: Capital IQ (a division of Standard & Poor's) and Motley Fool CAPS.

On CAPS, 90% of the 615 members who have rated American Tower believe the stock will outperform the S&P 500 going forward. These bulls include SunDevilDon and srimox.

Earlier this month, SunDevilDon touched on the massive tailwind working in American Tower's favor: "Market leader in the US and expanding into new countries. It benefits from growth in wireless devices like smart phones no matter if iPhone, Android or [BlackBerry]."

As the country's largest tower operator with more than 33,000 sites, American Tower remains a potent play on the ever-growing demand for wireless services. In fact, American Tower's three-year average operating margin (38.2%) easily tops that of its closest rivals, Crown Castle (25.1%) and SBA (11.5%), as well as other wireless infrastructure stocks like DragonWave (Nasdaq: DRWI) (-0.6%) and Qualcomm (Nasdaq: QCOM) (31.6%).

CAPS member srimox elaborates on the bull case:

They [build] cellular towers around the world, but their main business is in the US. These towers are leased out to the cell phone service providers. ... Cell phone service providers need them to supply service, and with 4G and all these new smartphones more and more service is needed. That means a lot of new business for [American Tower], and their stock could boom.

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