To the point four years ago, the German "Act Establishing the Federal Financial Supervisory Authority" (FinDAG) provided for a one-stop financial services agency, BaFin, which was to succeed three formerly independent public authorities for the supervision of banking, insurance and securities. Whereas this on-stop-shop approach has been both acclaimed and criticized, the US Securities and Exchange Commission from its very beginning administered the areas of corporate finance, market regulation and investment. Although the missions of both supervisory authorities correspond, the powers...