What Is Crypto Market Structure? SEC and CFTC's New 2026 Rules

Crypto market structure is the framework of participants, platforms and rules that make digital-asset markets function: exchanges, brokers, custodians, market makers, token issuers, investors and the regulators that oversee them. In the US, most of that framework is still being worked out, which is why "market structure" has become one of the most common phrases in federal crypto policy.

Two agencies dominate the debate. The SEC enforces investor-protection and disclosure rules under the Securities Act of 1933 and the Exchange Act of 1934, while the CFTC oversees derivatives and spot-market integrity under the Commodity Exchange Act of 1936. In March 2026 the two issued a joint interpretation grouping crypto assets into five categories — digital commodities, digital collectibles, digital tools, stablecoins and digital securities — and designated sixteen major tokens, including Bitcoin, Ethereum, XRP and Solana, as digital commodities. Spot trading of those tokens now sits primarily under CFTC anti-fraud authority, but no comprehensive federal registration regime for spot exchanges exists yet.

Why it matters

The structural gap is what the Digital Asset Market Clarity Act — the CLARITY Act — is meant to close. The House passed its version in 2025; the Senate Banking Committee advanced its version 15-9 on May 14, 2026, and full Senate approval still requires 60 votes plus reconciliation with the House text. If enacted, the bill would formally define a "digital commodity" in US law, place spot trading of those assets primarily under CFTC oversight, and create a federal registration framework for digital-commodity exchanges, brokers and dealers with custody, disclosure and capital standards attached. Stablecoins are already off the table: the GENIUS Act, signed in July 2025, makes payment stablecoins a regulated category backed one-to-one by dollars or low-risk reserves, supervised jointly by federal banking regulators and the Treasury.

The institutions that move the most capital treat market structure as a binding constraint. Compliance teams need rules they can map to existing reporting mandates; risk teams need qualified custodians; asset managers need regulated wrappers such as spot ETFs. That is why participation accelerated after each major regulatory clarification — spot Bitcoin ETFs in January 2024, spot Ethereum ETFs in mid-2024, and spot XRP ETFs in late 2025.

Market impact

The practical effects of a CLARITY-style framework would land first on venues and custodians. Centralized exchanges would face a federal registration regime with explicit capital, custody and disclosure standards for the first time; decentralized exchanges — Uniswap-style AMM protocols with no operator — would still sit in a regulatory gray zone, since there is no identifiable party to register.