We provide the first tests to distinguish whether individual investors equally balance their overall portfolios (naïve portfolio diversification--NPD) or engage in naïve buying diversification (NBD)--equally balancing values in same-day purchases of multiple assets. We find NBD in purchases of...

We provide the first tests to distinguish whether individual investors equally balance their overall portfolios (naïve portfolio diversification—NPD) or engage in naïve buying diversification (NBD)—equally balancing values in same-day purchases of multiple assets. We find NBD in purchases...

We provide the first tests to distinguish whether individual investors equally balance their overall portfolios (naïve portfolio diversification—NPD) or engage in naïve buying diversification (NBD)—equally balancing values in same-day purchases of multiple assets. We find NBD in purchases...

We ask to what extent task knowledge and tactics, or enduring personality traits, predict behaviour and biases in a stock trading setting. We base our study on an exceptionally wide-ranging dataset: responses to a self-report survey, together with transactional data of the same individual...

We use responses to a self-report survey and matched trading data to investigate the effects of personality (Big Five traits), IQ and financial literacy on individuals’ stock trading portfolios. Traits have small but significant effects: openness and extraversion are associated with...