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O'Shaughnessy buying global value to beat market

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Jim O'Shaughnessy, member of the "Squawk Box" inaugural Portfolio Challenge, is going against the grain and buying deeply unloved international stocks, such as BP and Swiss Reinsurance, to beat the crowd.

The chairman and CEO of O'Shaughnessy Asset Management is one of the few quantitative stock pickers among the 14 in the challenge, using his firm's historical data set of more than half a century to set his analysis apart.

O'Shaughnessy relies on this long-term, empirical evidence to find his stocks and then waits for short-term market gyrations to give him attractive entry points.