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Market mechanisms protect the vulnerable brain.

Kanchna Ramchandran¹, Dhananjay Nayakankuppam, Joyce Berg

¹Department of Neurology, UIHC 200 Hawkins Drive, Iowa City, IA 52242, USA. kanchna-ramchandran@uiowa.edu

Neuropsychologia

|May 24, 2011

Summary

Market trading can protect older adults with cognitive decline. Specifically, market mechanisms shielded individuals with lower caudate volume from prediction errors, contrary to common beliefs about market risks.

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Area of Science:

Neuroscience
Behavioral Economics
Cognitive Aging

Background:

Cognitive aging often involves decision-making deficits, particularly impacting the striatal nuclei crucial for predicting future outcomes.
The striatum, essential for economic decision-making, shows age-related structural and functional decline.

Purpose of the Study:

To investigate whether market mechanisms help or harm individuals with age-related decision-making deficits.
To examine the relationship between dorsal striatal decline and the efficacy of market-based trading in an aging population.

Main Methods:

Correlated market trading efficacy with dorsal striatal decline in older adults during the 2008 U.S. Presidential Election primary cycle.
Measured prediction error and in vivo caudate volume.

Main Results:

Impaired decision-makers exhibited higher prediction errors.
Reduced caudate volume was linked to increased prediction error.
Market-based trading mitigated prediction errors in older adults with lower caudate volume.

Conclusions:

Market-based mechanisms can protect individuals with brain-based decision-making vulnerabilities.
Contrary to public perception, markets may offer a protective effect for vulnerable traders, not just risks.