Definition of Broker

A broker is an intermediary that facilitates transactions between buyers and sellers or acts on behalf of clients in particular markets. Brokers may receive commissions, fees, or other forms of compensation depending on the transaction and industry.

In the United States, the term is used across several sectors, including securities, real estate, mortgages, insurance, and customs. Licensing and regulatory requirements vary significantly by broker type.

In the securities industry, the SEC generally defines a broker as a person engaged in the business of buying and selling securities on behalf of others. For example, an investor may use a brokerage firm to purchase shares of a U.S. public company.

Purpose of a Broker in U.S. Business and Finance

Depending on the industry and services provided, brokers can help clients:

1. Access Markets – Facilitate transactions in markets that may require specialized systems, registrations, or expertise.
2. Execute Transactions – Carry out purchases, sales, or other transactions on clients' behalf.
3. Provide Information or Recommendations – Certain brokers may provide recommendations or other assistance within the scope of their services and applicable regulations.
4. Facilitate Transactions – Help connect buyers, sellers, borrowers, lenders, insurers, or other parties.
5. Handle Documentation – Assist with transaction-related paperwork and regulatory requirements.

Common Types of Brokers in the U.S.

Securities Broker

A securities broker facilitates securities transactions for customers. Firms engaged in securities brokerage are generally known as broker-dealers and are subject to applicable SEC, FINRA, and other regulatory requirements.

Real Estate Broker

A licensed professional who assists with real estate transactions, such as buying, selling, or leasing property. Licensing requirements vary by state.

Mortgage Broker

An intermediary that connects borrowers with mortgage lenders and helps arrange mortgage financing, subject to applicable federal and state requirements.

Insurance Broker

A professional or business that helps clients evaluate and obtain insurance coverage. Licensing and permitted activities depend on state insurance laws.

Customs Broker

An individual, partnership, association, or corporation licensed by U.S. Customs and Border Protection, as applicable, to help importers and exporters meet federal customs requirements and complete transactions.

Advantages and Disadvantages of Using a Broker

Advantages

• Market Access – Brokers can provide access to securities, real estate, insurance, lending, and other markets.
• Transaction Support – They can assist with execution, documentation, and administrative processes.
• Professional Expertise – Specialized brokers may provide knowledge relevant to their particular market.
• Convenience – Brokers can simplify transactions that would otherwise require significant time or specialized knowledge.

Disadvantages

• Fees and Commissions – Brokerage costs can increase the total cost of a transaction or reduce investment returns.
• Potential Conflicts of Interest – Compensation structures or other relationships may create conflicts that must be appropriately addressed under applicable rules.
• Variable Services – Expertise, services, and responsibilities differ considerably among brokers and industries.
• Different Standards Apply – A broker's legal obligations depend on the industry, service, relationship, and applicable regulations.

Related Terms

• Dealer vs. Broker – In securities markets, a broker generally acts for others' accounts, while a dealer buys and sells securities for its own account as part of its business.
• Broker-Dealer – A person or firm engaged in securities activities as a broker, dealer, or both.
• Commission – A form of compensation that may be charged or received in connection with a transaction.
• Investment Adviser – A person or firm that provides investment advice and is subject to a regulatory framework distinct from that governing broker-dealers.
• Self-Directed Brokerage Account – A brokerage account in which the investor generally makes their own investment decisions.

Interesting Fact

A securities firm can act in more than one capacity. A broker generally executes securities transactions for customers, while a dealer trades for its own account as part of its business. Firms performing both functions are commonly called broker-dealers.

Statistic

According to FINRA, as of April 2026, the organization regulated approximately 3,000 large and small member brokerage firms in the United States, demonstrating the scale of the U.S. broker-dealer industry.

Frequently Asked Questions (FAQ)

1. Do I need a broker to buy stocks in the U.S.?

Individual investors generally buy and sell exchange-traded securities through a brokerage account. Brokerage services may come through traditional full-service firms or online, self-directed platforms.

2. How are securities brokers regulated in the U.S.?

Broker-dealers generally must register with the SEC and comply with applicable federal securities laws. FINRA regulates its member broker-dealer firms and their associated persons, while state securities regulators may also have authority.

3. What is the difference between a broker and an investment adviser?

A securities broker primarily engages in securities transactions for customers, while an investment adviser provides investment advice under a separate regulatory framework. Some firms and financial professionals are registered in both capacities.

4. Do securities brokers have a fiduciary duty?

The applicable standard depends on the relationship and capacity in which the financial professional is acting. When a broker-dealer makes a securities or investment strategy recommendation to a retail customer, Regulation Best Interest requires it to act in the customer's best interest and not put its own interests ahead of the customer's.

5. Can brokers work with both individuals and businesses?

Yes. Depending on the broker's industry, licensing, services, and regulatory requirements, brokers may work with individuals, businesses, institutional clients, or a combination of clients.