Based on the aggregated intelligence of 180,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, oil and natural gas producer ATP Oil & Gas (Nasdaq: ATPG) has earned a respected four-star ranking.

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

ATP facts

Headquarters (Founded) Houston (1991)
Market Cap $342.5 million
Industry Oil and gas exploration and production
Trailing-12-Month Revenue $651.3 million
Management Founder/Chairman/CEO T. Paul Bulmahn CFO Albert Reese, Jr.
Return on Equity (Average, Past 3 Years) (30.4%)
Cash/Debt $172.2 million / $2.0 billion

Sources: S&P Capital IQ and Motley Fool CAPS.

On CAPS, 96% of the 1,398 members who have rated ATP believe the stock will outperform the S&P 500 going forward. These bulls include MajorBob04 and Saratogahawk.

Earlier this week , MajorBob04 tapped ATP as a stock priced for imperfection: "Oil prices are climbing and any shred of good news for this company will send this stock even higher."

In fact, ATP sports a particularly paltry price-to-cash flow of 4. That represents a discount to much larger energy plays like BP (NYSE: BP) (8), ExxonMobil (NYSE: XOM) (7), and PetroChina (NYSE: PTR) (5).

In a reply pitch to MajorBob04, Saratogahawk elaborates on the bargain opportunity:

Leaseholds are in areas with large proven reserves. Octabuoy, Titan and Innovator are special drilling rigs with lots of market value. Israel and Cheviot are not figured in at all yet. Worst possible scenario that plays out is that ATPG gets bought out at a significant price based on reserve estimates. That probably makes any current holder some money. Long term by beginning of 2013 production will be up around 50k boe per day. That gives ATPG lots of free cash flow to develop the other leaseholds and open Cheviot. 2 years out this could easily be a $30-50 play.

What do you think about ATP, 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!

Interested in another easy way to track ATP? Add it to your watchlist.

Fool contributor Brian Pacampara owns no position in any of the companies mentioned. Try any of our Foolish newsletter services free for 30 days.

We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Fool's disclosure policy always gets a perfect score.