Fight or freeze? Individual differences in investors’ motivational systems and trading in experimental asset markets

Katrin Muehlfeld, Utz Weitzel and Arjen van Witteloostuijn

Journal of Economic Psychology, 2013, vol. 34, issue C, 195-209

Abstract: We analyze investors’ trading behavior, particularly their coping with fundamental shocks in asset value, depending on individual differences in the sensitivity of two basic neurophysiological systems—the Behavioral Approach System (BAS), the ‘driving force’ of human behavior, and the Behavioral Inhibition System (BIS), its ‘braking system’. By analyzing 15 independent experimental asset markets with a total of 171 participants, we find that differences in BAS and BIS sensitivity affect trading in both ‘normal’ and shock-trading environments: under normal trading conditions, individuals with a more sensitive BAS are more active traders, prefer riskier portfolios, and generate higher individual overall profits. High BIS subjects generate lower scalping and overall profits. Fundamental shocks generally reinforce the preference of high BAS investors for riskier portfolios, while positive shocks ‘unfreeze’ high BIS investors: they trade more frequently and generate higher profits. At the market level, normal trading in markets with a high BIS median is associated with lower volatility, compared to low BIS median markets, while greater concentration of traders’ BAS scores around the mean is associated with better efficiency and liquidity, compared to markets with lower BAS kurtosis. In high BIS median markets, positive shocks lead to improved efficiency, lower bid-ask spread, and lower volatility. We observe no significant differences in market-level reactions to negative shocks.

Keywords: Individual decision making; Investment decisions; Behavioral approach system/behavioral inhibition system; Experimental asset markets; Fundamental shocks (search for similar items in EconPapers)
JEL-codes: C91 D03 D81 G02 G11 (search for similar items in EconPapers)
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:joepsy:v:34:y:2013:i:c:p:195-209

DOI: 10.1016/j.joep.2012.09.014

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