And an iron law of business is that growth eventually dampens exceptional economics. just look at the records of high-return companies once they have amassed even $1 billion of equity capital. None that I know of has managed subsequently, over a ten-year period, to keep on earning 20% or more on equity while reinvesting all or substantially all of its earnings. Instead, to sustain their high returns, such companies have needed to shed a lot of capital by way of either dividends or repurchases of stock. Their shareholders would have been far better off if all earnings could have been reinvested
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