Stocks climbing to 10 times their original price are rare breeds -- but they're not impossible to find. Especially when you have Fools for friends.

The market's best stocks include companies that have risen dozens of times in value by taking advantage of the market's weaknesses. These aren't penny stocks; they're viable companies with sound business prospects that are achieving phenomenal returns. Finding just one or two of these monstrously successful firms can help you establish a winning portfolio.

Stalking the monster
To find tomorrow's winners, we've enlisted the help of more than 145,000 monster trackers at Motley Fool CAPS. We've compiled a list of the most successful CAPS members, dubbed All-Stars, whose picks have doubled, tripled, or even quadrupled in price. Then we've plucked out some of their recent picks for stocks they find equally promising.

Player

CAPS Member Rating

Monster Stock

CAPS Score*

Recent Stock Pick

CAPS Rating (out of 5)

BravoBevo

100.00

First Solar

547.09

Sigma Designs (NASDAQ:SIGM)

*****

fransgeraedts

99.98

Barclays

480.98

Direxion Daily Financial Bear 3X Shares

  (NYSE:FAZ)

*

vanamonde

99.99

Human Genome Sciences

477.89

PNC Financial Services (NYSE:PNC)

**

bbmaven

99.96

Walter Industries

425.46

K-Tron International

*****

vonwao

99.92

Mechel

546.23

Novartis (NYSE:NVS)

****

*Score is the number of percentage points that a pick outperformed the S&P 500.

Of course, this is not a list of stocks to buy -- or, for those monster stocks that our CAPS All-Stars have already found, to sell. Just consider them starting points for your own further research into extreme buying opportunities.

In search of Bigfoot
Does better accounting equate with better operations? Investors in PNC Financial Services apparently think so, having bid shares in the bank up more than 190% since their low point back in March.

Yet much of PNC's improvement is a result of the bank's accountants aggressively writing down large portions of the National City's assets at the time they were purchased. PNC bought its failed rival for about a 20% discount to National City's then-current share price, while also benefiting from a $5 billion income tax break, thanks to changes in tax rules enacted just before the purchase. Then the Treasury kicked in $7.7 billion in TARP funds. The gift PNC received included $98 billion in deposits and 19.7 million shares of Visa (NYSE:V), valued at nearly $1 billion at the time. Talk about laughing all the way to the bank.

By taking such extreme measures, though, PNC was ensuring that its books would look better in the future if the impaired loans made good. That's just the sort of gamesmanship played by JPMorgan Chase (NYSE:JPM) and Wells Fargo (NYSE:WFC) when they bought Washington Mutual and Wachovia, respectively.  Now PNC and Wells Fargo may be in a better position to pay off their TARP money sooner, rather than later.

That doesn't mean all investors have been taken in by the financial gymnastics. Just last week, CAPS member tortillatree doubted that PNC Financial Services would grow any further:

They used the TARP money to buy National City Bank. National City was the most unethical bank I've ever dealt with, and I'm glad to see them gone. However, PNC bought a lot of really bad loans in the deal. They also spent a LOT of money converting things over, inherited some lousy branches in Florida, and lost a lot of the good accounts who jumped ship during the conversion process. It's okay, except they still have to pay back the TARP money. So a struggling bank...buys a bankrupt bank....for too much money...and then wastes millions of dollars in conversions....and now they owe the money they borrowed and have a lot of bad loans to do something with. Oof...they're at a 52 week high, it's a no-brainer. There's only one direction the stock can go from this point.

Tell us over on the PNC Financial Services CAPS page whether you think this bank is ready to cash in on the deposits taxpayers made on its behalf.

A chance for scary growth
It takes more than a few All-Star picks and a quick paragraph to make buy or sell decisions so start your own research on these stocks on Motley Fool CAPS. You can read a company's financial reports, scrutinize key data and charts, and examine the comments your fellow investors have made, all from a stock's CAPS page. And while you're there, weigh in with your own thoughts on whether you think these are tomorrow's monster stocks.

Sigma Designs and First Solar are Motley Fool Rule Breakers selections. Novartis is a Global Gains pick. The Fool owns shares of K-Tron International. Try any of our Foolish newsletter services free for 30 days.

Fool contributor Rich Duprey does not have a financial position in any of the stocks mentioned in this article. You can see his holdings here. The Motley Fool has a disclosure policy.