Based on the aggregated intelligence of 170,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, medical lab operator Quest Diagnostics (NYSE: DGX) has earned a respected four-star ranking.

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

Quest facts

Headquarters (Founded)

Madison, N.J. (1967)

Market Cap

$8.4 billion

Industry

Health care services

Trailing-12-Month Revenue

$7.43 billion

Management

CEO Dr. Surya Mohapatra (since 2004)

CFO Robert Hagemann (since 1998)

Return on Equity (Average, Past 3 Years)

18.4%

Cash/Debt

$447.9 million / $3.14 billion

Competitors

LabCorp (NYSE: LH)

Bio-Reference Laboratories (Nasdaq: BRLI)

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

On CAPS, 95% of the 555 members who have rated Quest believe the stock will outperform the S&P 500 going forward. These bulls include All-Star MagicDiligence, who is ranked in the top 10% of our community, and tekennedy.

A few months ago, MagicDiligence touched on Quest's attractive position:

The largest independent diagnostic medical testing firm in the U.S., with over 2,000 locations. Duopoly with Lab Corp. Demographics is the story here -- as the U.S. population ages and doctors push preventative care, increased clinical testing demand should follow. Quest has solid competitive positioning and fair growth prospects.

While the "big two" of Quest and LabCorp are certainly the most obvious lab testing bets, our community seems to be finding value in the entire sector. Smaller, more specialized testers Genoptix (Nasdaq: GXDX) and Myriad Genetics (Nasdaq: MYGN) also carry four-star CAPS ratings, while Genzyme (Nasdaq: GENZ), which recently agreed to sell its lab testing business to LabCorp, doesn't sport a single All-Star underperform call. Of course, with the way Quest, LabCorp, and to a lesser extent, Bio-Reference, are currently dominating the business, several labs are simply choosing to sell out, creating plenty of takeover speculation in the space.

CAPS member tekennedy expands on how Quest, in particular, is nicely positioned to pounce:

Strong ROE with ability to grow. I like this company due to its strong competitive position, effectively sharing the market with [LabCorp], backed up by strong scale benefits. The company should also experience strong growth due to the oh-so-talked-about baby boomer aging and potential overall medical savings from increased screening. There is the potential of exponential growth in screening with genome based tests, which could help prevent or decrease the negative impact of a large number of major conditions. ... At its current pricing I believe this company should be able to outpace the S&P in the vast majority of situations.

What do you think about Quest, or any other stock for that matter? If you want to retire rich, you need to put together the best portfolio you can. Owning exceptional stocks is a surefire way to secure your financial future, and on Motley Fool CAPS, thousands of investors are working every day to find them. CAPS is 100% free, so get started!

Fool contributor Brian Pacampara owns no position in any of the companies mentioned. Quest is a Motley Fool Inside Value pick. LabCorp is a selection of Stock Advisor. The Fool owns shares of Bio-Reference. Try any of our Foolish newsletter services free for 30 days.

True to its name, The Motley Fool is made up of a motley assortment of writers and analysts, each with a unique perspective; sometimes we agree, sometimes we disagree, but we all believe in the power of learning from each other through our Foolish community. The Fool's disclosure policy always gets a perfect score.