Risk-taking begets risk-taking: Evidence from casino openings and investor portfolios

Abstract

We provide evidence that casino openings can have spillover effects on an individual's portfolio risk-taking. Using investor-level brokerage data and the initial legalization and opening of commercial casinos in the United States as a quasi-natural experiment, we find that, after a casino opens in close geographical proximity to investors, those with a high propensity to gamble (PTG) increase their idiosyncratic portfolio risk by 12.88% relative to those unlikely to gamble. This effect lasts for approximately 3 months and does not affect systematic portfolio risk. These results suggest that increased access to gambling can temporarily increase portfolio risk-taking for those with a PTG.