Fidelity urges SEC to refine rules for broker-dealers handling crypto assets

Fidelity Investments has submitted a detailed comment letter to the SEC urging modifications to broker-dealer regulations that would enable registered firms to custody cryptocurrency assets directly — without routing through separate qualified custodians. The proposal, backed by Fidelity's $4.9 trillion in assets under administration and its existing Fidelity Digital Assets custody business, targets the regulatory friction that adds 15-25 basis points of annual cost and 1-3 days of settlement delay to every institutional crypto transaction.

For the securities industry, Fidelity's proposal represents the most consequential rule change request since the creation of the alternative trading system (ATS) framework in the 1990s — potentially unlocking direct crypto-equity integrated custody that would fundamentally simplify institutional portfolio management.

The Regulatory Obstacle

The current regulatory framework creates an awkward separation for broker-dealers wanting to offer crypto services:

SEC Rule 15c3-3 (Customer Protection Rule). Requires broker-dealers to maintain customer securities and cash in segregated accounts with specific protections. The SEC has not definitively confirmed that crypto assets qualify as "securities" for custody purposes under this rule, creating legal uncertainty.

Former SAB 121 (rescinded January 2025). Required companies custodying crypto to recognize both an asset and an offsetting liability on their balance sheets — making crypto custody economically prohibitive for banks and broker-dealers due to capital reserve requirements. While rescinded, the industry hasn't fully adjusted practices.

Special Purpose Broker-Dealer framework (2021). The SEC created a limited registration path for "special purpose broker-dealers" that only handle crypto — but this path is too narrow for full-service firms like Fidelity that want to integrate crypto into existing brokerage accounts alongside stocks, bonds, and mutual funds.

The practical result: Fidelity Brokerage (the broker-dealer serving 43 million retail accounts) cannot directly custody Bitcoin or Ethereum for customers. Instead, customers wanting crypto must use Fidelity Digital Assets (a separate trust company entity) or access crypto through ETFs — both adding friction and cost versus direct custody.

Fidelity's Proposed Framework

The comment letter proposes a three-tier structure:

Tier 1: Full custody integration. Broker-dealers meeting enhanced capital requirements ($50M+ net capital) and demonstrating blockchain custody competency could hold crypto directly in customer accounts alongside traditional securities. Same account, same statement, same SIPC-like protections.

Tier 2: Operational controls. Custodying broker-dealers would implement: multi-signature wallet architecture, cold/warm/hot storage segregation following an 80/15/5 distribution, annual SOC 2 Type II attestation, and real-time proof-of-reserves reporting.

Tier 3: Customer protections. Crypto held by broker-dealers would receive protections functionally equivalent to SIPC coverage for securities — either through SIPC expansion or a parallel insurance mechanism funded by industry assessments.

Fidelity argues this framework satisfies the SEC's investor protection mandate while eliminating the artificial segregation that forces institutional investors to manage crypto through separate custodians, separate accounts, and separate settlement cycles.

The Economic Impact of Direct Custody

The cost differential between current (separate custodian) and proposed (direct broker-dealer) models is substantial:

Current model costs (per $100M in institutional crypto):

• Custodian fees: 15-25 bps ($150K-$250K annually)
• Settlement delays: 1-3 days (opportunity cost of T+2 versus T+0)
• Operational overhead: separate reconciliation, reporting, and compliance ($80K-$120K)
• Total: $230K-$370K per $100M annually

Proposed model costs:

• Integrated custody (absorbed into existing brokerage infrastructure): 3-5 bps
• Same-day settlement: zero opportunity cost
• Operational overhead: minimal (unified platform)
• Total: $30K-$50K per $100M annually

Savings: $200K-$320K per $100M — representing $2-3.2 billion in aggregate industry savings if applied across the estimated $1 trillion in institutional crypto AUM.

Competitive Positioning

Fidelity's advocacy is strategically motivated:

Existing infrastructure advantage. Fidelity Digital Assets already custodies $75 billion in crypto. If the SEC allows broker-dealer custody, Fidelity can migrate this AUM into its brokerage infrastructure — consolidating two entities into one and capturing the full value chain.

Client demand pressure. Institutional clients (pension funds, endowments, family offices) increasingly demand unified portfolio management across all asset classes. The current requirement to maintain separate crypto custody relationships creates friction that competitors (particularly non-U.S. platforms) don't face.

ETF cannibalization concern. Spot Bitcoin and Ethereum ETFs ($160B+ AUM) provide crypto exposure through traditional brokerage accounts — but at 20-95 bps expense ratios. Direct custody would enable Fidelity to offer zero-fee crypto holding (monetized through lending revenue and payment-for-order-flow), potentially cannibalizing its own ETF products but capturing higher-value direct relationships.

Why This Matters

For broker-dealer compliance teams: If adopted, Rule 15c3-3 modifications would require significant systems updates: blockchain custody infrastructure, crypto-specific net capital calculations, new customer account statements including digital asset positions, and modified FOCUS report submissions. Begin planning now for a 12-18 month implementation timeline if the SEC acts.

For institutional allocators: Direct broker-dealer custody eliminates the operational barrier that prevents many institutions from accessing crypto markets. If your investment policy currently restricts crypto due to custody complexity, Fidelity's proposed framework would remove that impediment once implemented.

For accounting firms: Clients that are broker-dealers will need advisory on: net capital impact of crypto custody, customer reserve formula modifications, SIPC assessment calculations, and financial statement presentation of custodied crypto assets (on vs. off balance sheet post-SAB 121 rescission).

For crypto custodians (Coinbase, BitGo, Anchorage): This represents an existential threat. If broker-dealers can custody directly, the standalone crypto custody business loses its regulatory moat. These companies must either become broker-dealers themselves or pivot to technology/infrastructure provision rather than custody services.

For retail investors: The end state of Fidelity's proposal: you log into your brokerage account and see Apple stock, Treasury bonds, a money market fund, and Bitcoin all on the same screen, all custodied by the same entity, all protected by the same framework. This simplification drives mainstream crypto adoption more effectively than any other regulatory change.

The key takeaway: Fidelity's proposal to allow broker-dealers to directly custody crypto would save the industry $2-3 billion annually in intermediary costs while enabling unified portfolio management that institutional clients demand — and if the SEC agrees, it makes standalone crypto custodians' business models obsolete within 3 years.