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Asset Market Reactions to News: An Experimental Study

53 Pages Posted: 20 Jan 2012  

David Porter

Chapman University - Department of Business and Economics

Gunduz Caginalp

University of Pittsburgh - Department of Mathematics

Li Hao

affiliation not provided to SSRN

Date Written: March 1, 2010

Abstract

An experimental asset market is used to test the effect of news concerning the underlying value of an asset on its trading price. Participants were divided into two groups and received different expected earnings values. Statistical support is found for the hypothesis that investors underreact to news on asset valuation. The results are consistent with the viewpoint that price and valuation history have a significant effect on trader behavior. Two sets of experiments involve a single asset with the same final earnings at the end of the experiment. Expected earnings are updated at the midpoint of the market trading. The two sets of experiments have different expectations of earnings during the first half of the experiment, which became identical after the midpoint. Despite this, the trading prices for the two sets of experiments differ significantly even after their expected earnings coincide. This provides support for underreaction and indicates that decision makers tend to anchor their price expectations to preexisting prices and/or valuations.

Suggested Citation

Porter, David and Caginalp, Gunduz and Hao, Li, Asset Market Reactions to News: An Experimental Study (March 1, 2010). Available at SSRN: https://ssrn.com/abstract=1988413 or http://dx.doi.org/10.2139/ssrn.1988413

David Porter (Contact Author)

Chapman University - Department of Business and Economics ( email )

Orange, CA
United States
(714) 997-6915 (Phone)
(714) 628-2881 (Fax)

Gunduz Caginalp

University of Pittsburgh - Department of Mathematics ( email )

507 Thackeray Hall
Pittsburgh, PA 15260
United States
412-624-8339 (Phone)
412-624-8397 (Fax)

Li Hao

affiliation not provided to SSRN

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