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The existence of informationally efficient markets when individuals are rational

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dc.creator Muendler, Marc-Andreas
dc.date 2004
dc.date.accessioned 2013-10-16T07:01:59Z
dc.date.available 2013-10-16T07:01:59Z
dc.date.issued 2013-10-16
dc.identifier http://hdl.handle.net/10419/18933
dc.identifier ppn:470789158
dc.identifier.uri http://koha.mediu.edu.my:8181/xmlui/handle/10419/18933
dc.description A rational-expectations equilibrium with positive demand for financial information does exist under fully revealing asset price - contrary to a wide-held conjecture. Generalizing the common additive signal-return model with CARA utility to the family of distributions with moment generating functions, this paper shows that individual investors endowed with an average portfolio demand information in equilibrium if they can adjust portfolio size. More information diminishes the expected excess return of a risky asset so that investors who only have a choice of portfolio composition or whose asset endowments strongly differ from the average portfolio are worse off. Under fully revealing price, information market equilibria both with and without information acquisition are Pareto efficient.
dc.language eng
dc.publisher
dc.relation CESifo working papers 1295
dc.rights http://www.econstor.eu/dspace/Nutzungsbedingungen
dc.subject D82
dc.subject G14
dc.subject D83
dc.subject ddc:330
dc.subject information
dc.subject efficiency
dc.subject financial markets
dc.subject portfolio theory
dc.subject Finanzmarkt
dc.subject Gleichgewicht
dc.subject Anlageverhalten
dc.subject Rationale Erwartung
dc.subject Informationseffizienz
dc.subject Effizienzmarktthese
dc.subject Portfolio-Management
dc.subject Theorie
dc.title The existence of informationally efficient markets when individuals are rational
dc.type doc-type:workingPaper


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