JPMorgan CEO Jamie Dimon says playing this game as a child helped develop his legendary investing skills

Dimon says he would ‘still be humbled’ if he tried the exercise today.

[Photo: Nathan Laine/Bloomberg via Getty Images]

Jamie Dimon has run JPMorgan Chase as CEO for 20 years, and under his leadership, it’s become the largest bank in the world by market capitalization. But Dimon’s business savvy started long before he ran JPMorgan, and even before he attended Harvard Business School.........

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