Economics 12th Edition by William Baumol, Alan S Blinder

Exercise 6

Show in diagrams that if a speculator were to buy when price is high and sell when price is low, he would increase price fluctuations. Why would it be in his best interest not to do so ( Hint: Draw two supply-demand diagrams, one for the high-price period and one for the low-price period. How would the speculator's activities affect these diagrams )