Polymarket said in a Monday announcement it updated market integrity rules for its global DeFi platform and its US exchange to better match regulatory expectations. The company outlined tighter market-design standards, clearer outcome resolution criteria, expanded surveillance, and limits on markets it considers easily manipulated or ethically sensitive.

Aave DAO has approved an Aave Request for Comment (ARFC) snapshot vote to kick off community discussion on deploying Aave V4 to Ethereum mainnet, with a rollout expected this year. The vote ran four days and closed with 100% support, starting a non-binding phase before any onchain Aave Improvement Proposal and deployment. V4 introduces a modular Hub-and-Spoke design and deeper integration of the GHO stablecoin, as the protocol navigates contributor changes including planned exits by BGD Labs and Aave Chan Initiative.

Resolv paused its protocol after a private key compromise let an attacker mint about $80M in uncollateralized USR, sparking a sharp depeg. The team said roughly 9M USR linked to the attacker has been burned, and the only confirmed loss so far is about $0.5M from redemptions processed before the pause. USR later traded near $0.19, down over 56% in 24 hours, while Resolv reported holding around $141M in assets as it prepares a redemption plan for pre-incident holders.

Fidelity Investments submitted a letter on March 20, 2026 urging the SEC to create a framework that allows broker-dealers to offer, custody, and trade crypto assets on Alternative Trading Systems. The firm also called for clearer standards for tokenized securities, updated reporting rules for DeFi, and guidance on using distributed ledger technology for recordkeeping without being labeled a "clearing agency."

On 23 March 2026, major international banks advanced pilot programs for tokenized deposits across multiple jurisdictions as they look to bring bank money onto blockchain rails. The initiatives emphasize that tokenized deposits retain bank-style safeguards such as AML compliance, capital rules, and deposit insurance, while Europe works to connect distributed ledgers with existing payment systems by the second half of 2026.

On Tuesday, the SEC and CFTC issued joint guidance that reclassifies most digital assets as commodities or "digital tools," narrowing the SEC's enforcement-heavy role. The shift has prompted conflict-of-interest concerns tied to World Liberty Financial, a DeFi project described as being controlled by the Trump family, as the new framework could reduce disclosure and registration burdens.

The House Financial Services Committee will meet Wednesday at 10:00 AM ET to examine how securities could be moved onto blockchain-based rails and whether current securities laws impede tokenized assets. Lawmakers are set to question witnesses from Nasdaq, DTCC, SIFMA, and the Blockchain Association while reviewing two draft bills tied to SEC-CFTC coordination and blockchain record-keeping for regulated firms.

On March 23, 2026, the U.S. Department of the Treasury announced sanctions targeting a North Korea-linked network accused of using data-extortion tactics against businesses. The action covers six individuals and two companies tied to an alleged $800,000,000 fraud haul in 2024, including a Vietnam-based entity said to have converted illicit proceeds into crypto assets.