Abstract This paper investigates potential sources of return to speculators in the commodity futures market. Initially, we focus on the "classic arbitrage model" based on the theories of Keynes (1930), Kaldor (1939), Our research indicates that these models have inherent shortcomings in being able to pinpoint a definitive source of structural risk premium within the complexity of the commodity futures markets. We hypothesize that the classic arbitrage pricing theory contains circular logic, and as a consequence, its natural state is disequilibrium, not equilibrium. We extend this hypothesis to suggest that the term structure of the futures price curve, while indicative of a potential roll return benefit, in fact implies a complex...