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Fortune
Fortune
Sydney Lake

Mark Cuban put $500K into a stranger's rocket company over email. It's now a SpaceX competitor worth $4 billion

(Credit: Getty Images—Nicola Gell)

Mark Cuban has a track record of making bold business bets with limited information.

He once bought a $25 million Dallas mansion sight unseen, calling it his one “why the f–k not purchase.” But one of his most lucrative gambles started even more casually: with a cold email from a stranger he says he’s still never met.

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