Which of the following is NOT something that is needed for a market to be efficient? A. A large number of buyers and sellers. B. Information being released in a random fashion. C. No transactions costs. D. None of the above. In other words, ALL of the above are necessary for a market to be efficient.) Which of the following is NOT something that is needed for a market to be efficient? A. A large number of buyers and sellers. B. Information being released in a random fashion. C. No transactions costs. D. None of the above. In other words, ALL of the above are necessary for a market to be efficient.)