Is Financial Risk-Taking Behavior Genetically Transmitted?

In this paper, we use a sample of almost 30,000 Swedish mono- and dizygotic twins to study the heritability of financial risk-taking. Following a major pension reform in the year 2000, virtually all Swedish adults had to simultaneously make a financial decision affecting post-retirement wealth. We take this event as a field experiment to infer risk preferences. We use standard techniques from behavior genetics to partition variation in risk-taking into environmental and genetic components. Our findings suggest that genetic variation is an important source of individual heterogeneity in financial risk-taking.