This essay will appear as a chapter in a forthcoming edited volume published by Oxford University Press. It builds on the earlier article, Beyond Intermediation: A New (FinTech) Model for Securities Holding Infrastructures, 22 U. Pa. J. Bus. L. 386 (2020), which argues that serious consideration should be given to modifications of the deeply intermediated securities holding systems in the United States and elsewhere. Many of the costs and risks imposed by the intermediated holding systems fall within the domain of the regulation of securities markets (internal costs), such as impairments of shareholder voting and bondholder claims against issuers. Others fall outside of that sphere (external costs), such as the enforcement of anti-mon...