On the other hand, while the investment funds had substantial investments and substantial gains in IBM, the combination of its apparently high price and the impossibility of being certain about its rate of growth prevented them from having more than, say, 3% of their funds in this wonderful performer. Hence the effect of this excellent choice on their overall results was by no means decisive. Furthermore, many—if not most—of their investments in computer-industry companies other than IBM appear to have been unprofitable.From these two broad examples we draw two morals for our readers: Obvious prospects for physical growth in a business do not translate into obvious profits for investors. The experts do not have dependable ways of selecting and concentrating on the most promising companies in the most promising industries.

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On the other hand, while the investment funds had substantial investments and substantial gains in IBM, the combination of its apparently high price and the impossibility of being certain about its rate of growth prevented them from having more than, say, 3% of their funds in this wonderful performer. Hence the effect of this excellent choice on their overall results was by no means decisive. Furthermore, many—if not most—of their investments in computer-industry companies other than IBM appear to have been unprofitable.From these two broad examples we draw two morals for our readers: Obvious prospects for physical growth in a business do not translate into obvious profits for investors. The experts do not have dependable ways of selecting and concentrating on the most promising companies in the most promising industries.



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