A Simple Proof That Futures Markets are Almost Always Informationally Inefficient
Previous work which showed that prices could aggregate perfectly the diverse information of traders depended critically on the assumption that all agents had constant absolute risk utility. We show that either all agents must have constant absolute risk aversion utility, or all must have constant relative aversion in order for the strong form of the efficient market hypothesis to hold generically.
|Date of creation:||Dec 1989|
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- Radner, Roy, 1979. "Rational Expectations Equilibrium: Generic Existence and the Information Revealed by Prices," Econometrica, Econometric Society, vol. 47(3), pages 655-78, May.
- Grossman, Sanford J & Stiglitz, Joseph E, 1980.
"On the Impossibility of Informationally Efficient Markets,"
American Economic Review,
American Economic Association, vol. 70(3), pages 393-408, June.
- Sanford J Grossman & Joseph E Stiglitz, 1997. "On the Impossibility of Informationally Efficient Markets," Levine's Working Paper Archive 1908, David K. Levine.
- Albert S. Kyle, 1989. "Informed Speculation with Imperfect Competition," Review of Economic Studies, Oxford University Press, vol. 56(3), pages 317-355.
- Bray, Margaret M, 1981. "Futures Trading, Rational Expectations, and the Efficient Markets Hypothesis," Econometrica, Econometric Society, vol. 49(3), pages 575-96, May.
- Tirole, Jean, 1982. "On the Possibility of Speculation under Rational Expectations," Econometrica, Econometric Society, vol. 50(5), pages 1163-81, September.
- Grossman, Sanford J & Stiglitz, Joseph E, 1976. "Information and Competitive Price Systems," American Economic Review, American Economic Association, vol. 66(2), pages 246-53, May.
- Jordan, J S, 1983. "On the Efficient Markets Hypothesis," Econometrica, Econometric Society, vol. 51(5), pages 1325-43, September.
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