Aretz, Kevin, Bartram, Söhnke M. and Pope, Peter F.. (2011) Asymmetric loss functions and the rationality of expected stock returns. International Journal of Forecasting, Vol.27 (No.2). pp. 413-437. ISSN 0169-2070

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Abstract

We combine the innovative approaches of Elliott, Komunjer, and Timmermann (2005) and Patton and Timmermann (2007) with a block bootstrap to analyze whether asymmetric loss functions can rationalize the S&P 500 return expectations of individual forecasters from the Livingston Surveys. Although the rationality of these forecasts has often been rejected, earlier studies have relied on the assumption that positive and negative forecast errors of identical magnitudes are equally important to forecasters. Allowing for homogenous asymmetric loss, our evidence still strongly rejects forecast rationality. However, if we allow for variation in asymmetric loss functions across forecasters, not only do we find significant differences in preferences, but also we can often no longer reject forecast rationality. Our conclusions raise serious doubts about the homogeneous expectations assumption often made in asset pricing, portfolio construction and corporate finance models.

Item Type:	Journal Article
Subjects:	H Social Sciences > HG Finance
Divisions:	Faculty of Social Sciences > Warwick Business School > Finance Group Faculty of Social Sciences > Warwick Business School
Journal or Publication Title:	International Journal of Forecasting
Publisher:	Elsevier
ISSN:	0169-2070
Official Date:	April 2011
Dates:	Date Event April 2011 Published
Volume:	Vol.27
Number:	No.2
Number of Pages:	25
Page Range:	pp. 413-437
Identification Number:	10.1016/j.ijforecast.2009.10.008
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/44741

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