Investors may under-diversify their portfolios by overweighting securities in which they perceive an informational advantage or by underweighting securities to hedge risks outside the portfolio. We investigate under-diversification in institutional portfolio construction by examining the...

We investigate the effect of line-of-business diversification on asset risk-taking in the U.S. property-liability industry. The coordinated risk management hypothesis (Schrand and Unal, 1998) implies a negative relation between underwriting risk and investment risk. Consistent with this...