Disposition Effect and Loss Aversion: An Analysis Based on a Simulated Experimental Stock Market

We experimentally investigate the existence of and possible origin of the disposition effect. Our approach has three distinct characteristics: Firstly, we created an experimental environment that closely mimics a real stock market and were thus able to obtain and analyze trading behavior data that accurately depicts actual individual investor trading behavior. Secondly, based on a questionnaire survey we conducted during the experiment, we were able to pinpoint each individual participantfs reference point. This, in effect, allowed us to verify an independent hypothesis of the existence of the disposition effect. such an approach differs from the extant literature, where only a joint hypothesis has been examined so far. Thirdly, we measured individual loss aversion coefficients and directly tested whether loss aversion is a cause of the disposition effect. Our results indicate both the existence of the disposition effect as well as prospect theoryfs loss aversion being one of its sources.