The Evening Brief: Custody rules, sanctions enforcement, and layoffs reshape institutional crypto

Saturday brought four regulatory and institutional stories that reshape the scaffolding around crypto custody, sanctions enforcement, and staffing. The SEC's custody proposal and Treasury's A7 Network designation both issued on October 1, marking a rare alignment of agency rulemaking on the same day; Anchorage Digital announced a 17% layoff on Saturday, and Arbitrum's Security Council paused new Stylus contract activations Friday to forestall AI-assisted attacks.

The SEC's custody framework, per the desk's reporting, permits registered investment advisers and funds to self-custody crypto assets or use state-chartered trust companies as custodians. The proposal updates rules under the Investment Advisers Act and Investment Company Act, replacing years of regulatory ambiguity that kept institutional players sidelined. A 60-day public comment period begins upon Federal Register publication; the final rule timeline and any material narrowing of self-custody or state trust conditions during review will determine when advisers can act on the new lanes.

Treasury designated Russia's A7 Network as a transnational criminal organization and proposed prohibiting transmittals of funds involving its Sub-Agents. The network moved $179.1 billion in A7A5, a ruble-backed token, between February 2025 and June 2026, while processing more than $17 billion in dollar transactions, according to the desk's reporting. The ban will bind roughly 348,000 institutions globally, including crypto exchanges. The reporting notes that A7A5 runs on decentralized blockchains, so the rule's effectiveness depends on exchange and custodian compliance rather than technical barriers; the network has already shifted supply to unhosted wallets since a prior breach.

Anchorage Digital, the first federally chartered US digital asset bank, cut 17% of its workforce this week, affecting approximately 68 people from a global headcount of about 400 as of early 2025, per Cointelegraph's reporting. This is the company's second major reduction; it cut 20% in 2023. The broader tech sector is contracting sharply: US tech firms announced 165,925 cuts so far this year, up 54% from 2025, with tech representing 29% of all job cut announcements.

Arbitrum's Security Council halted new Stylus contract activations on October 2 to prevent increasingly sophisticated AI-assisted attacks using hand-crafted WebAssembly programs. Existing Stylus applications continue running, but developers cannot deploy new or updated Stylus-based programs until activations reopen. The Council raised the activation gas requirement prohibitively high; it has not specified a reopening date.

The Independent Community Bankers of America sued the OCC on October 2 in federal court seeking to vacate the national trust bank rule and Interpretive Letter 1176. The ICBA argues the agency exceeded its authority by widening limited-purpose trust charters to fintech and crypto firms. The OCC has approved or conditionally approved 21 trust banks since December 2025, 13 tied to crypto. The ruling will determine whether national trust banks become a firmer federal route for custody and stablecoin infrastructure.

Iran's central bank is moving to disconnect rial bank accounts and payment gateways from domestic crypto exchanges including Nobitex and Wallex, citing market manipulation concerns. The plan escalates temporary trading limits the central bank introduced in late September on Tether, capped at 2,000 USDT per user per day with nightly trading suspensions; those limits were set to expire around October 3 to 4. The reporting notes the central bank itself holds hundreds of millions in USDT while Tether has frozen over $475 million in CBI-linked holdings.

On the desk's boards, whale flows show $91.2 million in net value moving onto exchanges over the past 48 hours, led by $146.4 million in bitcoin flowing onto exchanges and $499.8 million in USDT moving to Binance. The desk's Whale Watch board shows $915 million moved onto exchanges in the week ending October 3, continuing a multi-week pattern of inflow. Bitcoin ETF flows turned positive on October 2 with a $31.7 million inflow, marking two consecutive days of inflows totaling $82.9 million over the past five sessions. Ethereum ETF flows remain negative, with a $17.3 million outflow on October 2 and a net four-day outflow of $118.0 million. Bitcoin trades at $84,485.79, down 0.4% on the day but up 15.7% over the month; Ethereum is at $2,666.07, down 1.4% on the day but up 14.6% over the month. The Fear & Greed Index sits at 67 (Greed), near the top of its 30-day range of 50-78.