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The SEC registration statement Fidelity filed for the Reserves Digital Fund reveals a product with a more restrictive investment mandate than any other money market fund in the institutional category, one that deliberately limits its universe to assets specifically permitted under the GENIUS Act rather than the broader investment-grade universe available to standard government money market funds.
The 485APOS filing, registered under Fidelity Hereford Street Trust and effective June 12, 2026, discloses a fund that invests exclusively in US Treasury bills, notes, and bonds with remaining maturities of 93 days or less, cash, overnight repurchase agreements fully collateralized by US Treasuries, and other registered government money market funds, with a statutory mandate that every investment must qualify as an eligible reserve asset under the GENIUS Act and any regulations adopted under it.
As covered in our GENIUS Act final rules analysis, that investment restriction is commercially significant because it means the fund's yield will be lower than standard government money market funds that can invest in a wider universe, a trade-off Fidelity has explicitly disclosed in the fund's risk section and accepted in exchange for unambiguous GENIUS Act compliance.
Key Takeaways
- The Fidelity Reserves Digital Fund's SEC filing mandates that every investment must qualify as a GENIUS Act-eligible reserve asset, restricting the fund to 93-day-or-less US Treasuries, cash, overnight repurchase agreements, and registered government money market funds, a narrower universe than standard government money market funds.
- The fund carries a $1 million minimum initial investment, is offered exclusively to institutional investors including stablecoin issuers, and may in the future offer additional share classes that use blockchain technology to maintain a record of share ownership.
- The total annual operating expense is 0.18% after a 0.07% fee waiver and expense reimbursement against the 0.25% management fee, with no distribution or service fees and no shareholder fees, making it the most competitively priced purpose-built stablecoin reserve product from a major asset manager.
What the SEC Filing Reveals That Initial Coverage Did Not
The 485APOS filing discloses four details about the Reserves Digital Fund that the initial news coverage did not address and that matter commercially for stablecoin issuers evaluating the fund as a reserve management solution.
The first is the explicit GENIUS Act investment mandate. The fund's principal investment strategies section states that the fund invests only in eligible reserve assets that payment stablecoin issuers are permitted to maintain under the GENIUS Act and any regulations adopted thereunder. That language means the fund's investment policy is directly tethered to the GENIUS Act's reserve asset definition, and the fund's permitted universe will automatically update as GENIUS Act regulations evolve.
For a stablecoin issuer, this creates a reserve management product that tracks regulatory compliance rather than requiring the issuer to independently verify that each fund holding qualifies under the GENIUS Act.
The second is the 93-day maturity ceiling. The fund restricts all Treasury holdings to instruments with remaining maturities of 93 days or less, the most conservative maturity profile available in the money market fund category.
As covered in our stablecoin treasury report, the OCC's three-tier liquidity framework requires at least 10% of outstanding stablecoins to be redeemable the same business day, and the 93-day maturity ceiling ensures that the Reserves Digital Fund's holdings are sufficiently liquid to support that same-day redemption requirement without requiring the issuer to maintain separate liquidity reserves.
The third is the blockchain share class disclosure. The filing states the fund may offer additional share classes in the future that employ blockchain technology to maintain a record of share ownership. This is Fidelity's explicit signal that the Reserves Digital Fund is designed to become a tokenized money market fund in a future iteration, potentially giving stablecoin issuers on-chain access to their reserve positions in a form that is directly composable with blockchain-based stablecoin accounting systems.
As covered in our top institutional stablecoins guide, the convergence between tokenized money market funds and stablecoin reserve management products is the most commercially significant structural development in the institutional digital asset category of 2026, and Fidelity's blockchain share class disclosure confirms it is building toward that convergence from the reserve management side.
The fourth is the stablecoin issuer reserves risk disclosure. The filing explicitly identifies a risk category it calls Stablecoin Issuer Reserves Risk, noting that fund assets are expected to fluctuate depending on the creation of additional stablecoins or the redemption of outstanding stablecoins, and that stablecoins may face periods of uncertainty or volatility that could result in rapid or unexpected redemption requests.
This risk disclosure confirms that Fidelity has modeled the fund's redemption dynamics around stablecoin run scenarios rather than standard institutional money market fund redemption patterns, and that the fund's liquidity management framework is specifically calibrated for the stablecoin reserve use case.
The Fee Structure in Detail
The 485APOS filing's fee table reveals a fee structure that is more nuanced than the headline 0.18% expense ratio suggests. The fund's gross management fee is 0.25%, which Fidelity reduces to 0.18% through a 0.07% fee waiver and expense reimbursement. There are no distribution or service fees, no shareholder fees, and other expenses are estimated at 0.00% for the current fiscal year.
The practical cost is $18 per $10,000 invested per year at the waived expense ratio. For a stablecoin issuer with $100 million in reserves held in the fund, the annual reserve management cost is $180,000.
For comparison, maintaining equivalent direct Treasury positions through a traditional custodian relationship would require separate custody fees, transaction costs, and compliance monitoring costs that would likely exceed the Reserves Digital Fund's 0.18% all-in expense for issuers without an existing institutional Treasury management infrastructure.
As covered in our State Street SSCXX analysis, both purpose-built stablecoin reserve products launched this week are positioned as cost-competitive with direct Treasury management for stablecoin issuers that would otherwise need to build their own reserve infrastructure.
The $1 Million Minimum and Institutional Access
The $1 million minimum initial investment confirms that the Reserves Digital Fund is designed exclusively for institutional-scale stablecoin issuers rather than for smaller fintech stablecoin products with lower reserve balances. The fund notes it may waive or lower purchase minimums, suggesting flexibility for stablecoin issuers in the early stage of scaling their reserve balances above the minimum threshold.
The fund is managed by Fidelity Management and Research Company LLC as primary investment adviser, with other investment advisers serving as sub-advisers. Contact for institutional stablecoin issuer onboarding is directed to FDAMIR@fmr.com, a dedicated institutional contact channel that reflects Fidelity's expectation that fund distribution will be driven by direct institutional relationships rather than through standard broker-dealer channels.
As covered in our Fidelity Reserves Digital Fund launch analysis, the Fidelity Digital Assets institutional relationship is the primary commercial advantage for stablecoin issuers evaluating the fund, and the dedicated institutional contact channel confirms that the fund's distribution model is built around that existing relationship infrastructure rather than open-market distribution.
Conclusion
The SEC filing for the Fidelity Reserves Digital Fund reveals a product whose investment mandate, fee structure, risk disclosures, and future blockchain share class plans collectively confirm that Fidelity has built the most comprehensively GENIUS Act-calibrated stablecoin reserve management product filed with the SEC to date.
The 93-day maturity ceiling, GENIUS Act-only investment mandate, stablecoin run scenario risk modeling, and blockchain share class development roadmap distinguish the Reserves Digital Fund from both standard government money market funds and from State Street's SSCXX in ways that the initial news coverage did not fully disclose.
For stablecoin issuers evaluating reserve management options before the July 18 GENIUS Act final rules deadline, the SEC filing's level of GENIUS Act-specific investment policy detail makes the Reserves Digital Fund the most transparently compliance-architected reserve product currently available from a major institutional asset manager.
FAQ:
1. What does the Fidelity Reserves Digital Fund SEC filing reveal about the fund's investment policy?
The SEC filing reveals the fund invests exclusively in US Treasuries with 93-day or less maturities, cash, overnight repurchase agreements collateralized by Treasuries, and registered government money market funds, with a statutory mandate that every investment must qualify as a GENIUS Act-eligible reserve asset under the Act and any regulations adopted under it.
2. What is the Fidelity Reserves Digital Fund's minimum investment and who can access it?
The fund has a $1 million minimum initial investment, is offered exclusively to institutional investors including stablecoin issuers, and is accessed through Fidelity's dedicated institutional channel at FDAMIR@fmr.com, with the fund noting it may waive or lower the minimum for qualifying institutional clients.
3. What is the blockchain share class disclosed in the Fidelity Reserves Digital Fund SEC filing?
The SEC filing discloses that the fund may offer additional share classes in the future that employ blockchain technology to maintain a record of share ownership, signaling that Fidelity is building toward a tokenized version of the Reserves Digital Fund that would give stablecoin issuers on-chain access to their reserve positions directly composable with blockchain-based stablecoin accounting systems.
4. What is the Stablecoin Issuer Reserves Risk disclosed in the SEC filing?
The Stablecoin Issuer Reserves Risk disclosure states that fund assets are expected to fluctuate with stablecoin creation and redemption activity and that stablecoins may face uncertainty or volatility resulting in rapid redemption requests, confirming that Fidelity has specifically calibrated the fund's liquidity management framework around stablecoin run scenarios rather than standard institutional money market fund redemption patterns.
5. What is the difference between the Fidelity Reserves Digital Fund's 0.18% expense ratio and its 0.25% management fee?
The difference between the 0.18% expense ratio and the 0.25% management fee is that Fidelity applies a 0.07% fee waiver and expense reimbursement reducing the gross 0.25% management fee to a net 0.18% total annual operating expense, with no distribution fees, no shareholder fees, and other expenses estimated at 0.00%, making the 0.18% figure the all-in annual cost for institutional stablecoin issuers holding reserves in the fund.
Disclaimer:
This content is provided for informational and educational purposes only and does not constitute financial, investment, legal, or tax advice; no material herein should be interpreted as a recommendation, endorsement, or solicitation to buy or sell any financial instrument, and readers should conduct their own independent research or consult a qualified professional.
