type="main" <title type="main">ABSTRACT</title> <p>We conduct a study in which subjects trade stocks in an experimental market while we measure their brain activity using functional magnetic resonance imaging. All of the subjects trade in a suboptimal way. We use the neural data to test a “realization utility”...</p>

We investigate whether prospect theory preferences can predict a disposition effect. We consider two implementations of prospect theory: in one case, preferences are defined over "annual" gains and losses; in the other, they are defined over "realized" gains and losses. Surprisingly, the annual...