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Proc Natl Acad Sci U S A. 2008 Apr 22;105(16):6167-72. doi: 10.1073/pnas.0704025105. Epub 2008 Apr 14.

Endogenous steroids and financial risk taking on a London trading floor.

Author information

1
Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, United Kingdom. jmc98@cam.ac.uk

Abstract

Little is known about the role of the endocrine system in financial risk taking. Here, we report the findings of a study in which we sampled, under real working conditions, endogenous steroids from a group of male traders in the City of London. We found that a trader's morning testosterone level predicts his day's profitability. We also found that a trader's cortisol rises with both the variance of his trading results and the volatility of the market. Our results suggest that higher testosterone may contribute to economic return, whereas cortisol is increased by risk. Our results point to a further possibility: testosterone and cortisol are known to have cognitive and behavioral effects, so if the acutely elevated steroids we observed were to persist or increase as volatility rises, they may shift risk preferences and even affect a trader's ability to engage in rational choice.

PMID:
18413617
PMCID:
PMC2329689
DOI:
10.1073/pnas.0704025105
[Indexed for MEDLINE]
Free PMC Article
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