Glossary term

Investment Advisers Act of 1940

The Investment Advisers Act of 1940 is the main U.S. federal law regulating many firms and people paid to provide advice about securities.

Updated

May 22, 2026

Read time

3 min read

What Is the Investment Advisers Act of 1940?

The Investment Advisers Act of 1940 is the main U.S. federal law regulating many firms and people paid to provide advice about securities. It provides the framework for SEC registration, disclosure, recordkeeping, compliance obligations, and the fiduciary standard that applies to SEC-registered investment advisers.

The Act matters because investment advice creates trust and conflict risk. Clients may rely on an adviser for portfolio decisions, financial planning, manager selection, or ongoing investment supervision. The law helps define who is an investment adviser and what obligations follow.

Key Takeaways

  • The Investment Advisers Act of 1940 regulates many paid providers of securities advice.
  • It is separate from the Investment Company Act of 1940, which governs many pooled funds.
  • SEC-registered investment advisers owe fiduciary duties to clients under the Advisers Act framework.
  • The Act supports registration, Form ADV disclosure, compliance, recordkeeping, custody, advertising, and anti-fraud rules.
  • Registration does not guarantee skill, independence, low fees, or investment performance.

Who the Act Covers

The Act generally focuses on persons or firms that, for compensation, are in the business of advising others about securities. This can include portfolio managers, registered investment adviser firms, certain consultants, and advisers to funds or private clients.

Not every financial professional is regulated the same way. Broker-dealers, banks, insurance agents, accountants, lawyers, publishers, and family offices may fall under different rules or exclusions depending on what they do and how they are paid. The label on a business card is not enough; the actual services and compensation matter.

What the Act Requires

Area

Investor relevance

Registration

Shows whether the adviser reports to the SEC or state authorities

Form ADV

Discloses services, fees, conflicts, disciplinary history, and business practices

Fiduciary duty

Requires loyalty and care under the Advisers Act framework

Compliance and records

Supports supervision and regulatory examination

Anti-fraud rules

Prohibit deceptive conduct and misleading statements

Fiduciary Duty

The SEC has described an investment adviser's fiduciary duty as including a duty of care and a duty of loyalty. In practice, that means the adviser must provide advice in the client's best interest, seek best execution where relevant, provide advice based on a reasonable understanding of the client's objectives, and fully and fairly disclose conflicts.

Disclosure alone is not magic. Investors still need to understand fees, conflicts, compensation, custody, investment approach, and whether the adviser is acting as an adviser, broker, or both in a particular relationship.

How Investors Use It

The Act shows up most practically through Form ADV and the Investment Adviser Public Disclosure database. These tools help investors check registration, assets under management, ownership, services, fees, disciplinary history, and conflicts.

Before hiring an adviser, investors should read Form ADV Part 2A, ask how the adviser is paid, understand the investment process, confirm where assets are custodied, and compare the adviser's services with the client's actual needs.

What It Does Not Do

The Act does not make all advisers good advisers. It does not guarantee returns, eliminate conflicts, prevent high fees, or prove that an investment strategy is appropriate. It creates a legal and disclosure framework, but judgment still matters.

Investors should distinguish regulatory status from quality. A registered adviser can still be expensive, poorly matched, too complex, or wrong about markets. The useful question is how the legal duty, business model, incentives, and service process work together.

The Bottom Line

The Investment Advisers Act of 1940 is the central U.S. federal law for many paid providers of securities advice. It matters because it shapes registration, fiduciary duties, disclosures, and compliance, but investors should still review Form ADV, fees, conflicts, custody, services, and fit before relying on an adviser.

Related Terms