A parent company that owns a subsidiary with superb long-term economics is not likely to sell that entity regardless of price. “Why,” the CEO would ask, “should I part with my crown jewel?” Yet that same CEO, when it comes to running his personal investment portfolio, will offhandedly—and even impetuously—move from business to business when presented with no more than superficial arguments by his broker for doing so. The worst of these is perhaps, “You can’t go broke taking a profit.” Can you imagine a CEO using this line to urge his board to sell a star subsidiary? In our view, what makes
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