The Investment Advisers Act of 1940 is the United States federal statute that defines who counts as an investment adviser, requires many of them to register with a regulator, and holds them to a fiduciary standard when they counsel clients on buying or selling securities. It is administered by the Securities and Exchange Commission (SEC), the federal agency that oversees securities markets, and codified at 15 U.S.C. sections 80b-1 through 80b-21. For advertising and ad tech, the Act matters less for how agencies run campaigns than for who is legally permitted to give financial advice, a question that has moved to the centre of platform policy and enforcement as creators dispense stock tips to millions of viewers.

The law reaches the marketing community through a specific mechanism. Its 2020-amended advertising rule, known as the Marketing Rule, is what governs whether a registered adviser can pay a social media creator to endorse its services, and under what disclosure conditions. That rule is the reason "finfluencer" partnerships in regulated finance carry compliance weight that a sneaker endorsement does not.

What the Act regulates and how the definition works

The operative term is "investment adviser." Section 202(a)(11) defines it, in substance, through a three-part test drawn from the statutory language and long-settled SEC interpretation: a person is an investment adviser if they provide advice about securities, are in the business of doing so, and receive compensation for it. Meet all three and the Act applies. The definition is deliberately broad. It captures a solo financial planner recommending mutual funds, a hedge fund manager advising a pooled vehicle, and a firm that sells written stock recommendations for a subscription fee.

Registration is where the Act bites. An adviser that must register files a Form ADV, a disclosure document that sets out the firm's services, fees, conflicts of interest, and disciplinary history, and becomes subject to SEC examination and recordkeeping obligations. Registration is split between federal and state level by size. Above 100 million dollars in assets under management an adviser generally registers with the SEC; between 25 million and 100 million it typically registers with its home state, unless that state does not examine advisers; below 25 million it is a state matter. Those thresholds are not original to the 1940 law. The Dodd-Frank Wall Street Reform and Consumer Protection Act raised the federal registration floor from 25 million to 100 million dollars in 2010, pushing mid-sized advisers down to state regulators and requiring most private fund managers to register for the first time.

The Act also imposes conduct standards that do not depend on registration. Section 206, the anti-fraud provision, makes it unlawful for any investment adviser to defraud clients or engage in transactions that operate as a fraud or deceit, and it applies whether or not the adviser is registered. In SEC v. Capital Gains Research Bureau, decided December 9, 1963, the Supreme Court read Section 206 as imposing a fiduciary duty by operation of law. The case involved an adviser who bought a security for his own account, recommended it to clients, then sold into the price rise the recommendation produced, a practice known as scalping. The Court held that failing to disclose that conflict was itself a fraud on clients, even if the underlying advice was honestly held. The fiduciary duty that flowed from that ruling, a duty of loyalty and care requiring full disclosure of conflicts, remains the spine of adviser regulation.

Origin and evolution with dates

The Act was signed into law in August 1940, appearing at 54 Stat. 847 as Title II of the same legislation that created the Investment Company Act of 1940. Both grew out of a Congressionally mandated SEC study of investment trusts and advisory services carried out during the 1930s, and both belong to the cluster of securities statutes, the Securities Act of 1933 and the Securities Exchange Act of 1934 among them, that Congress passed to address abuses it blamed for the 1929 crash and the Depression that followed. The Advisers Act is the shortest of these laws, and the SEC has historically adopted relatively few rules under it.

The milestones since have layered obligations onto that base. The 1963 Capital Gains ruling established the fiduciary reading of Section 206. Dodd-Frank in 2010 redrew the registration map and folded in private fund advisers. The most consequential recent change for marketers came on December 22, 2020, when the SEC adopted amendments merging the old advertising rule and the separate cash solicitation rule into a single Marketing Rule under Rule 206(4)-1. Compliance became mandatory on November 4, 2022. For the first time, the rule permitted registered advisers to use testimonials and endorsements, including paid ones from social media promoters, provided the adviser meets conditions: clear disclosure of whether the promoter was compensated and of any material conflicts, a written agreement with the promoter, and oversight of the promotion.

Why the term matters for the marketing community

The relevance sharpened as financial advice migrated to short-form video. A study published September 3, 2026 by the licensing advisory firm Legalaes, reported by PPC Land, analysed 1,764 finance videos across YouTube, TikTok, Instagram, and Facebook and found that only 2.2 percent of the 1,266 unique creators held demonstrable financial credentials such as Certified Financial Planner or Chartered Financial Analyst. The firm positioned its findings explicitly against the Advisers Act, citing it alongside the United Kingdom's Financial Services and Markets Act 2000 and the European Union's Markets in Financial Instruments Directive as the frameworks that assume credentialing the content does not have.

The Marketing Rule is the specific hook where the statute meets the influencer economy. When a registered adviser pays a creator to promote its services, that creator becomes a "promoter" and the post becomes the adviser's advertisement, subject to the rule's disclosure and oversight conditions. In September 2024 the SEC settled with nine registered advisers over Marketing Rule violations that included unsubstantiated claims and improperly disclosed endorsements, with combined penalties exceeding 1.2 million dollars. On December 16, 2025 the SEC's Division of Examinations published a risk alert flagging disclosure failures at the point of dissemination, across websites, social media, and referral networks, as the most common deficiency. The direction of travel matches what PPC Land has documented on the advertising side, where Google expanded mandatory financial advertiser verification to 24 EU and EEA countries in June 2026, requiring banks, insurers, and investment firms to prove national authorisation before running ads.

Limitations, criticisms, and the publisher exclusion

The Act's largest and most contested boundary is the publisher exclusion. Section 202(a)(11)(D) carves out from the definition of investment adviser "the publisher of any bona fide newspaper, news magazine or business or financial publication of general and regular circulation." A financial publication, in other words, is not an investment adviser and need not register, no matter how much stock commentary it prints. The scope of that carve-out was settled in Lowe v. SEC, decided June 10, 1985. The SEC had tried to stop Christopher Lowe, whose adviser registration it had revoked over criminal conduct, from publishing an investment newsletter. The Supreme Court held that his newsletters fell within the publisher exclusion because they offered impersonal commentary sold in an open market rather than advice "attuned to any specific portfolio or to any client's particular needs." Justice John Paul Stevens, writing for the Court, drew the line at personalisation: "The mere fact that a publication contains advice and comment about specific securities does not give it the personalized character that identifies a professional investment adviser." Reading the exclusion narrowly, the Court also noted, would have raised First Amendment problems the statute was meant to avoid.

Lowe drew a durable distinction between impersonal publishing and person-to-person advice, but critics argue the 1985 framework fits an era of printed newsletters awkwardly onto platforms where audiences filter, subscribe, and interact. A 2024 federal court decision applying the exclusion to Seeking Alpha, the crowd-sourced financial analysis site, addressed exactly that gap, finding the site's features let subscribers filter generally available content rather than receive personal communications, and declining what the court framed as a hyper-literal reading of Lowe divorced from modern realities. The tension is unresolved: the boundary between a "bona fide publication" and unregistered personalised advice was drawn for typeset newsletters and is now asked to police algorithmic feeds.

Disambiguation

The Advisers Act is frequently confused with adjacent statutes and roles. The Investment Company Act of 1940, its sibling passed the same day, regulates the funds themselves, mutual funds and closed-end funds, rather than the people who advise on securities. A registered investment adviser (RIA) is a firm that has completed registration under the Advisers Act; the Act is the law, the RIA is the entity it produces. A broker-dealer executes securities transactions and is regulated primarily under the Securities Exchange Act of 1934 and by FINRA, holding a different and historically lower conduct standard than an adviser's fiduciary duty, though the two roles increasingly overlap. And the "solely incidental" exclusion is a separate carve-out from the publisher one: a lawyer, accountant, or engineer whose advice about securities is merely incidental to their profession and who receives no special compensation for it is not an investment adviser, which is why a tax accountant mentioning a security in passing does not trip the definition.

Recent developments

Enforcement under the Act has concentrated on the Marketing Rule's testimonial and endorsement provisions, the precise seam where paid creators enter regulated finance. The SEC's December 16, 2025 risk alert was the third focused on the rule, following alerts in June 2023 and April 2024, and it singled out failures to deliver required disclosures at the moment content reaches an audience. The Division of Investment Management updated its Marketing Compliance FAQs on January 15, 2026. The pressure is not confined to advisers: in 2024 FINRA brought its first enforcement action against a broker-dealer's finfluencer programme, fining the firm 850,000 dollars primarily over failures to supervise and retain records rather than over the content of any single post. Platforms have moved in parallel, with YouTube announcing it will label brand deals that creators fail to disclose, tightening the same disclosure seam the SEC polices.

Timeline

  • August 1940: The Investment Advisers Act is enacted at 54 Stat. 847, alongside the Investment Company Act of 1940
  • December 9, 1963: The Supreme Court decides SEC v. Capital Gains Research Bureau, reading Section 206 to impose a fiduciary duty on advisers
  • June 10, 1985: The Supreme Court decides Lowe v. SEC, holding that bona fide financial publications fall outside the definition of investment adviser
  • July 21, 2010: The Dodd-Frank Act raises the federal registration threshold from 25 million to 100 million dollars and requires many private fund advisers to register
  • December 22, 2020: The SEC adopts the amended Marketing Rule (Rule 206(4)-1), merging the advertising and cash solicitation rules
  • November 4, 2022: Compliance with the Marketing Rule becomes mandatory
  • 2024: A federal court applies the publisher exclusion to Seeking Alpha; the SEC settles with nine advisers over Marketing Rule violations; FINRA brings its first finfluencer enforcement action
  • December 16, 2025: The SEC's Division of Examinations issues its third Marketing Rule risk alert
  • January 15, 2026: The Division of Investment Management updates its Marketing Compliance FAQs

Summary

Who: The SEC administers the Act; it applies to anyone who advises on securities for compensation as a business, from solo planners to hedge fund managers, while exempting bona fide financial publishers under the Lowe framework.

What: A 1940 federal statute defining investment advisers, requiring many to register via Form ADV, imposing a fiduciary duty under Section 206, and, through the 2020 Marketing Rule, governing how advisers use paid endorsements including from social media creators.

When: Enacted in August 1940, given its fiduciary reading in 1963, its publisher boundary in 1985, its modern registration thresholds in 2010, and its current advertising regime effective November 4, 2022.

Where: United States federal law, split between SEC and state registration by adviser size, with conduct standards reaching advisers wherever they counsel US clients.

Why: It determines who is legally permitted to give financial advice and under what disclosure conditions, a question now central to the finfluencer economy, where uncredentialed creators reach mass audiences and enforcement has concentrated on paid endorsements.