Based on the aggregated intelligence of 145,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, car rental company Dollar Thrifty Automotive Group (NYSE:DTG) has received the dreaded one-star ranking.

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

Dollar Thrifty facts

Headquarters (Founded)

Tulsa, Okla. (1989)

Market Cap

$606.9 million

Industry

Rental and leasing services

Trailing-12-Month Revenue

$1.56 billion

Management

CEO Scott Thompson (since 2008)
CFO Clifford Buster, III (since 2008)

Trailing-12-Month Return on Equity

(13.5%)

Cash / Debt

$205.99 million / $1.76 billion

1-Year Return

2,120%

Competitors

Avis Budget (NYSE:CAR)
Hertz Global Holdings (NYSE:HTZ)

CAPS Members Bearish on DTG Also Bearish on

Direxion Daily Financial Bull 3X (NYSE:FAS)
Targacept (NASDAQ:TRGT)

CAPS Members Bullish on DTG Also Bullish on

Citigroup (NYSE:C)
Bank of America (NYSE:BAC)

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

On CAPS, 84% of the 204 All-Star members who have rated Dollar Thrifty believe the stock will underperform the S&P 500 going forward. These bears include All-Stars sprint17 and mrindependent, both of whom are ranked in the top 15% of our community.

Late last month, sprint17 predicted that the stock would soon run out of gas: "[T]he company announced that they expect their [rental revenue] to drop 8-10% this year, yet the price still seems to defy all odds.  Reality will set in eventually, and when it does I will be ready and waiting."

In a pitch from last week, mrindependent elaborates on that bearishness. Here's an excerpt:

At its current price this company's enterprise value is $2.0 billion (i.e. the sum of net debt plus market cap). … At the current price of $27.55, this company is selling at two times book value despite the fact that it is currently losing money and despite the fact that the company's long term returns on equity are tepid at best. Plus, we ought to consider that this company is highly leveraged. … Also consider that this company operates in a terrible industry. There are too many competitors and no company enjoys any durable competitive advantage. Based on the valuation of this company and on its terrible industry, I believe that Dollar Thrifty is likely to disappoint.

What do you think about Dollar Thrifty, or any other stock for that matter? If you want to retire rich, you need to protect your portfolio from any undue risk. Staying away from dangerous stocks is crucial to securing your financial future, and on Motley Fool CAPS, thousands of investors are working every day to flag them. CAPS is 100% free, so get started!

Fool contributor Brian Pacampara owns no position in any of the companies mentioned. The Fool's disclosure policy always gets a perfect score.