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Unbiased Disagreement in financial markets, waves of pessimism and the risk return tradeoff

Napp, Clotilde; Jouini, Elyès (2011), Unbiased Disagreement in financial markets, waves of pessimism and the risk return tradeoff, Review of Finance, 15, 3, p. 575-601. http://dx.doi.org/10.1093/rof/rfq002

Type
Article accepté pour publication ou publié
External document link
http://halshs.archives-ouvertes.fr/halshs-00488481/fr/
Date
2011
Journal name
Review of Finance
Volume
15
Number
3
Publisher
Oxford University Press
Pages
575-601
Publication identifier
http://dx.doi.org/10.1093/rof/rfq002
Metadata
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Author(s)
Napp, Clotilde cc
Jouini, Elyès
Abstract (EN)
Can investors with irrational beliefs be neglected as long as they are rational on average ? Do their trades cancel out with no consequences on prices, as implicitly assumed by traditional models? We consider a model with irrational investors, who are rational on average. We obtain waves of pessimism and optimism that lead to countercyclical market prices of risk and procyclical risk-free rates. The variance of the state price density is greatly increased. The long run risk-return relation is modified; in particular, the long run market price of risk might be higher than both the instantaneous and the rational ones.
Subjects / Keywords
rational on average; irrational investors
JEL
D53 - Financial Markets
G12 - Asset Pricing; Trading Volume; Bond Interest Rates

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