Steve Ballmer is richer than Warren Buffett. But his portfolio depends mostly on one stock.
Briefly

Ballmer emphasized, "Microsoft's outperformed just about every other asset I could have owned," showcasing his belief in the strength of his concentrated investment strategy.
He noted his struggles in the past with diversification, saying, "I struggled to find money managers who consistently beat the market," emphasizing his preference for concentrated investing.
Read at Business Insider
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