Final answer:
The Securities Act of 1933 protects investors with full and fair disclosure of new securities issues.
Step-by-step explanation:
The act that protects investors with full and fair disclosure of new securities issues is the Securities Act of 1933. This act was established after the stock market crash of 1929 and aimed to restore confidence in the securities market by requiring companies to provide accurate and complete information about their securities offerings. It also established the Securities and Exchange Commission (SEC) to regulate the investment industry and protect investors.