The purpose of the No Stock Act is to prevent conflicts of interest by banning stock trading and certain financial transactions for specific high-ranking government officials. The goal is to ensure that these officials make decisions based on public interest rather than personal financial gain. Key provisions of the Act include a complete prohibition on holding, buying, or selling stocks and other financial interests by covered individuals, which include members of Congress, the President, the Vice President, Supreme Court Justices, and certain Federal Reserve officials.