Zero-Sum Again

I was asked this morning a question from a reader of Trend Following:

“Do you have any references that discuss why the zero-sum concept is critical? The zero-sum concept is interesting theoretically, but seems to have no practical use or meaning. Thanks, John “

I am not sure how you say that after reading every last word of chapters 3 and 4 of my book Trend Following? It is spelled out….especially pages 109-111. I am up for any debate, but not following your foundation here. Hit me back and explain?

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You might like my 2017 epic release: Trend Following: How to Make a Fortune in Bull, Bear and Black Swan Markets (Fifth Edition). Revised and extended with twice as much content.