Proponents of additional antitrust intervention to police common ownership simply have not made their case. Their theory as to why current levels of intra-industry diversification would cause consumer harm is implausible and the empirical evidence they say demonstrates such harm is both scant and methodologically suspect. The policy solutions they have proposed for dealing with the purported problem would radically rework an industry that has provided substantial benefits to investors, raising the costs of portfolio diversification and enhancing agency costs at public companies. Courts and antitrust enforcers should reject their calls for additional antitrust intervention to police common ownership.
Thom Lambert and Michael E. Sykuta,
Calm Down About Common Ownership, 41 Regulation 28
Available at: https://scholarship.law.missouri.edu/facpubs/789