Based on the aggregated intelligence of 170,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, U.S. auto icon General Motors (NYSE: GM) has received the dreaded one-star ranking.

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

GM facts

Headquarters

Detroit

Market Cap

$50.55 billion

Industry

Auto manufacturers

Trailing-12-Month Revenue

$135.59 billion

Management

Chairman/CEO Daniel Akerson (since 2010)

Vice Chairman/CFO Christopher Liddell (since 2010)

Trailing-12-Month Return on Capital

7.8%

Cash/Debt

$26.6 billion / $11.6 billion

Competitors

Ford (NYSE: F)

Honda Motor (NYSE: HMC)

Toyota Motor (NYSE: TM)

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

On CAPS, 30% of the 507 members who have rated GM believe the stock will underperform the S&P 500 going forward. These bears include hug1bear and All-Star kurtdabear, who is ranked in the top 15% of our community.

On Jan. 4, hug1bear seriously questioned GM:

I don't believe the company can gain any momentum against the entrentched competition. I don't see 'unique' in its offerings. Ford offers a better option for growth.

Over the next five years, in fact, GM is expected to grow its bottom line at pace of 10.3% annually. That's slower than competitors like Ford (17.7%), Honda (25.1%), and Toyota (56.3%).

CAPS All-Star kurtdabear elaborates on the bear case:

GM's next bankruptcy will be its last. The shameless hype the government used to peddle its shares to gullible investors would have been prosecuted in any private-party IPO.... This company's unfunded (and unfundable) future pension obligations alone are enough to sink it.

What do you think about GM, 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. General Motors is a Motley Fool Inside Value recommendation. Ford is a Motley Fool Stock Advisor choice, and the Fool owns shares of it. 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.