This chapter evaluates securities regulation in the United States. For a variety of reasons, domestic US securities regulation has served as a model to the world, either directly or through its influence in international standard setting. The parallel system, however, has not been exported and so remains a somewhat unique aspect of US law, and based on the concept of the foreign private issuer (FPI), appears firmly entrenched. Going forward, it is possible that the domestic and international aspects of US markets may become more integrated, or at least coordinated. Calls for greater EU-style deference to home country regulation for non-US issuers and market participants would certainly simplify, and perhaps undermine, the US parallel system. There is no doubt as to the decline of US hegemony in regulation of international capital markets. Within the United States, level playing field arguments continue to surface, sometimes in surprising ways.