This casebook offers a clear and concise introduction to the economics of securities markets, which drive regulation of securities, and has a single-minded focus on disclosure and the economics of disclosure. It is concise, easy to read, and student friendly. The chapters are organized around motivating hypotheticals. These hypotheticals make it easier for the students to follow the material, and are a very useful teaching device. This casebook attempts to make securities regulation easy to teach and understand. It provides role-playing and prospectus-drafting exercises to involve students in learning tedious securities materials (i.e., prospectuses). It contains tables and charts to organize complicated material. The book teaches the rules within the framework of the economics of disclosure. Each chapter starts with a motivating hypothetical to illustrate the various issues. It is shorter and more comprehensible than other casebooks. It is focused on the important principles students will need to understand to be effective corporate lawyers. The book avoids policy debates and instead focuses on understanding the rules as they are. It focuses on the Securities Exchange Act of 1934 first, then the 1933 Act.