Short-term trading website tradingmarkets.com is hosting a trading contest, whereby 10 former Playboy Playmate centerfold models each assembled a virtual portfolio of five stocks in January, to see how they would do against the S&P 500 and universe of mutual fund managers, Business Week reports.

As a group, the ladies' portfolios were up 7.87% through May 1, versus the S&P 500's 4.56%. If their holdings were assembled as a mutual fund, they'd be in the top-performing quartile of all funds.

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