The name Mario Gabelli is famous not only for his family of mutual funds but also for his prowess in consistently picking stock winners.

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"This has been my baby for two years, " says Faisal, 38, who has built Ruba (he is vague about the source of the name) on his dirt-poor family's trading origins in Pakistan's frontier provinces.

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The 27-year-old, whose family emigrated to Brooklyn when he was nine, is undefeated in 28 fights, with 15 stoppages to his name.

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