Trading experience modulates anterior insula to reduce the endowment effect

Area of Science:

• Neuroeconomics
• Behavioral Economics
• Cognitive Neuroscience

Background:

• The endowment effect, a cognitive bias where owners demand higher prices for goods than they'd pay to acquire them, is well-documented.
• While experienced traders exhibit a muted endowment effect, the underlying neural mechanisms remain unclear.

Purpose of the Study:

• To investigate how trading experience influences the neural correlates of the endowment effect.
• To identify specific brain regions and mechanisms through which trading experience impacts economic decision-making.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to compare brain activity between experienced and inexperienced traders during selling decisions.
• Researchers examined activation in the right anterior insula, nucleus accumbens, and orbitofrontal cortex.
• Incentivized trading experience was provided to inexperienced traders to observe its effect.

Main Results:

• Experienced traders demonstrated significantly lower activation in the right anterior insula when selling compared to inexperienced traders.
• No significant differences in nucleus accumbens or orbitofrontal cortex activation were observed between the groups.
• Reduced insula activation was found to mediate the mitigating effect of trading experience on the endowment effect.

Conclusions:

• Trading experience appears to reduce the endowment effect by modulating negative affective responses associated with selling, specifically via decreased right anterior insula activity.
• The findings suggest that frequent trading can retrain emotional responses, thereby lessening the impact of this common economic bias.