The Sherman Antitrust Act of 1890 is a cornerstone of United States competition law. Its fundamental goal is to preserve a competitive marketplace by prohibiting business activities that are deemed anti-competitive. The Act outlaws formal cartels and other collusive practices that restrain trade, such as price-fixing, market allocation, and group boycotting. By preventing monopolies and conspiracies that would otherwise harm the market, the law aims to protect consumers by ensuring they benefit from fair competition, which typically results in lower prices and higher quality goods and services. In the real estate industry, it specifically prohibits brokers from colluding on commission rates.

A. This describes the goal of the Fair Housing Act of 1968, which prohibits discrimination in the sale, rental, and financing of housing based on protected classes.

B. This is the purpose of consumer credit protection laws, such as the Fair Credit Billing Act, not antitrust legislation.

D. This is the primary objective of securities regulations, such as the Securities Act of 1933, which governs the issuance of new securities.

1. Federal Trade Commission (FTC). "The Antitrust Laws." This official government source states, "The Sherman Act outlaws 'every contract, combination, or conspiracy in restraint of trade,' and any 'monopolization, attempted monopolization, or conspiracy or combination to monopolize.'... In general, the antitrust laws are the laws that promote and protect competition." (Accessed from the FTC's official website, Guide to Antitrust Laws section).

2. Code of Virginia. Title 59.1, Chapter 1.1, § 59.1-9.5. "Contracts, etc., in restraint of trade illegal." The Virginia Antitrust Act is the state-level counterpart to the Sherman Act and states, "Every contract, combination or conspiracy in restraint of trade or commerce of this Commonwealth is unlawful." This directly reflects the federal goal of promoting competition.

3. University of Minnesota Libraries Publishing. (2016). Real Estate Principles. Chapter 10, "Real Estate Brokerage and the Law," Section 10.4 "Federal and State Laws Affecting Real Estate." This university courseware explains that the Sherman Antitrust Act was enacted to "prevent monopolies and to encourage competition." It further details prohibited acts in real estate, such as price-fixing and group boycotting, which directly harm consumer choice and fair competition.