zero-sum adjective (of a game or situation) in which whatever is gained by one side is lost by the other. Clearly Futures are zero sum. I am clearly dumb, as I dont understand the point tommcginnis is trying to make either? Perhaps he can give us some concrete examples instead of talking abstractly.
%% Cant argue with that; but CME , IBKR, + others [S& P small liscence ]tend to rake off a profit also+ they should.They have to , so we can get a '' free '' LOL paper calender.