FYOXX — Fidelity Treasury Digital Fund

FYOXX Fund Overview

FYOXX — Fidelity Treasury Digital Fund is a US mutual fund managed by Fidelity Hereford Street Trust, categorised as Money Market. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.

• Type: US mutual fund
• Manager: Fidelity Hereford Street Trust
• Category: Money Market
• Ticker: FYOXX
• SEC CIK: 0000917286
• SEC series ID: S000089156
• Share class ID: C000261149

FYOXX Investment Objective and Strategy

Fidelity Treasury Digital Fund describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Fidelity Hereford Street Trust.

Investment objective

Fidelity Treasury Digital Fund seeks to obtain as high a level of current income as is consistent with the preservation of capital and liquidity.

Principal investment strategy

"Investing only in cash and U.S. Treasury bills, notes and bonds with a remaining maturity of, or issued with a maturity of, 93 days or less.Investing only in eligible reserve assets that payment stablecoin issuers are permitted to maintain under the Guiding and Establishing National Innovation for U.S. Stablecoins Act (""GENIUS Act"") and any regulations adopted thereunder.Normally investing in securities whose interest is exempt from state and local income taxes.Investing in compliance with industry-standard regulatory requirements for money market funds as well as any applicable GENIUS Act requirements for the quality, maturity, liquidity, and diversification of investments. In addition, the fund normally invests at least 80% of its assets in U.S. Treasury securities. Treasury securities are high-quality securities issued or guaranteed by the U.S.

Treasury. Treasury securities are backed by the full faith and credit of the U.S. Treasury. Treasury securities usually pay a fixed, variable, or floating rate of interest, and must repay the amount borrowed, usually at the maturity of the security. Use of Blockchain The fund's transfer agent maintains the official record of share ownership of the OnChain class in book-entry form. Ownership of the OnChain class will also be recorded - or digitized - on a public blockchain. Although the secondary recording of the OnChain class on a blockchain will not represent the official record of ownership, the transfer agent will reconcile the secondary blockchain transactions with the official records of the OnChain class on at least a daily basis during business days under normal conditions. Reconciliation involves maintaining a matching book-entry record and blockchain record of the total number of shares in circulation and the ownership of the shares at any given time.

A blockchain is an open, distributed ledger that digitally records transactions in a verifiable and immutable (i.e., permanent) way using cryptography. A distributed ledger is a database in which data is stored in a decentralized manner. Cryptography is a method of storing and transmitting data in a particular form so that only those for whom it is intended can read and process it. A blockchain stores transaction data in ""blocks"" that are linked together to form a ""chain"", hence the name blockchain. The secondary recording of OnChain class shares on a blockchain will not affect the fund's investments or its investment strategies. The fund will invest, consistent with Rule 2a-7 under the Investment Company Act of 1940 (1940 Act), at least 99.5% of total assets in cash and U.S. Treasury securities.

The fund will not invest in any crypto assets. For more information regarding the use of blockchain technology for the OnChain class, see ""Use of Blockchain"" in the Fund Basics section of this prospectus. More detailed information about blockchain technology and the public blockchain network(s) used by the fund's transfer agent, including the regulatory, operational and technological risks associated with distributed ledger technology, as well as detailed information about the fund and its policies and risks, can be found in the fund's Statement of Additional Information (SAI)."

FYOXX Costs and Fees

FYOXX costs about $20 per $10,000 invested per year in fund expenses.

• Net expense ratio: 0.20%
• Gross expense ratio: 0.25%

FYOXX Debt Constituents

No individual debt constituents are reported in Fidelity Treasury Digital Fund's latest SEC N-PORT filing.

FYOXX Prospectus and SEC Filings

Official Fidelity Treasury Digital Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.

• Prospectus (485BPOS) — filed 2026-06-24
• Prospectus (485BPOS) — filed 2025-07-24
• Prospectus (485BPOS) — filed 2025-06-24
• Annual census (N-CEN) — filed 2026-07-10
• Annual census (N-CEN) — filed 2025-07-10

Related Funds

Other Money Market funds tracked on ABC INVEST:

• Emerald Growth Fund (HSPCX)
• Barings Active Short Duration Bond Fund (BXDIX)
• IVA Worldwide Fund (IVWAX)
• Stadion Tactical Growth Fund (ETFDX)
• BBH Partner Fund - Select Short Term Assets (BBSTX)

Data Sources

ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.