Which federal regulation requires disclosure by issuers offering securities to the public?

The Securities Act of 1933 is the regulation that mandates issuers to disclose important financial information to the public when offering securities. This act aims to provide investors with adequate information to make informed decisions, thus promoting transparency and fairness in the securities market. By requiring registration and a prospectus that outlines the company’s financial condition, risks associated with the investment, and other pertinent data, the act seeks to protect investors against fraud and misrepresentation.

The other options refer to different regulations that address various aspects of securities and investor protection but do not focus specifically on the requirement for issuers to disclose information when offering securities. For instance, the Investment Advisors Act of 1940 pertains to the regulation of investment advisors, while the Securities Investor Protection Act of 1970 deals with the protection of customers' funds and securities in the event of brokerage failures. The Securities Exchange Act of 1934 primarily governs the secondary trading of securities and the operations of stock exchanges but does not set the initial disclosure requirements for issuers. Thus, the Securities Act of 1933 is the correct answer due to its specific focus on the requirements for public offerings.