Tokenized Money Market Funds for Treasury: A Fund Share, Not a Stablecoin

This article answers one question: what is a BUIDL- or BENJI-class token, as a treasury instrument and a balance-sheet line? On a block explorer it sits next to USDC and looks like the same kind of thing. It is not. One is a money market fund share — a yield-bearing fund interest with a manager, a custodian, and a regulatory wrapper; the other is a payment stablecoin. The scope here is that identity and its accounting consequence. Whether a tokenized fund is the right yield choice, and how its liquidity profile compares to other on-chain yield, is the separate question covered in tokenized T-bills for yield and the fixed-vs-variable comparison.

In short

• A tokenized MMF token (BUIDL/BENJI-class) is a fund share — yield-bearing, with a manager, custodian, and regulatory wrapper.
• A stablecoin is a payment instrument: par-redeemable, reserve-backed (post-GENIUS), typically paying the holder no yield.
• The decision is fund-share vs stablecoin: yield, redemption mechanics, issuer/custody, and accounting all differ.
• BUIDL: a BlackRock fund, Securitize-managed, BNY Mellon custody, holding cash/Treasuries/repos, with 24/7 USDC conversion via Circle; institutional.
• BENJI: Franklin FOBXX, the first US-registered tokenized MMF, tokenising the shareholder registry (1 share = 1 BENJI).
• A fund interest is not a stablecoin's accounting line — it is instrument-specific, and neither is automatically cash. This is the instrument question, distinct from the RWA overview.

Different instruments that look alike

A tokenized money market fund token represents a share in a fund: a yield-bearing fund interest with a fund manager, a custodian, a regulatory wrapper, and NAV mechanics. A stablecoin is a payment instrument the issuer redeems at par and (post-GENIUS) backs with reserves, typically paying the holder no yield. On-chain they resemble each other; as treasury instruments they differ in yield, redemption, issuer, and accounting.

How BUIDL and BENJI work

(Mechanics stated; fund size/yield figures change and are out of scope — confirm current terms.)

The treasury decision

It is a yield-and-profile decision, not "which is safer":

• a tokenized MMF share generally accrues yield and is a fund interest with redemption terms and minimums;
• a stablecoin typically pays the holder no yield and is a par-redeemable payment instrument.

Choose by whether the treasury wants yield-bearing reserve-like exposure with fund mechanics, or a payment-ready non-yield instrument — with different liquidity, counterparty, and accounting consequences. This is the decision the RWA overview does not make for you.

Accounting is not the same

A fund share is a security or fund interest, not a payment token. It is typically not cash, and its accounting follows the nature of the fund interest and the jurisdiction — distinct from a stablecoin's classification. Neither is automatically cash. Treat the accounting as instrument-specific and confirm it; on-chain similarity does not imply the same balance-sheet line.

Practical checklist before adding a tokenized MMF to treasury

Before allocating treasury capital to a BUIDL- or BENJI-class instrument, a finance team should work through the following items — not as a substitute for professional advice, but as the minimum structure of the due-diligence process:

1. Investor eligibility: BUIDL requires institutional KYC onboarding through Securitize; confirm whether the entity qualifies and what the minimum subscription is. BENJI has different access profiles. Do not assume on-chain accessibility equals legal eligibility.
2. Redemption timeline: identify the specific redemption route (for BUIDL: USDC conversion via Circle for near-instant exits; standard NAV redemption otherwise) and its hours, cut-off times, and any queue risk at scale. Tokenized does not mean instant unconditionally.
3. Regulatory wrapper: confirm the fund's registration status, jurisdiction of the fund itself, and whether holding a share creates any reporting obligation in the treasury entity's home jurisdiction (e.g. offshore fund filing in the US on Form 8621 for PFICs, or equivalent elsewhere).
4. Accounting classification: determine how the instrument is classified under the applicable framework (IFRS 9 / US GAAP) — typically a financial asset measured at fair value, not cash or a cash equivalent. Get auditor sign-off on the classification before year-end.
5. Counterparty map: identify the manager, custodian, conversion partner (Circle for BUIDL), and smart contract issuer. A failure in any link — manager insolvency, custodian issue, conversion-partner disruption — affects the instrument differently from a stablecoin failure.
6. Chain selection: both BUIDL and BENJI are multi-chain; confirm on which chain the treasury will hold, the operational tooling for that chain, and whether the fund offers the same redemption rights across all supported chains.

Risks to diligence

• redemption mechanics and minimums (institutional thresholds, conversion routes such as USDC);
• reliance on the manager/custodian and the conversion partner;
• the regulatory wrapper of the specific fund;
• per-chain operational considerations (multi-chain token);
• the underlying's usual money-market/interest-rate considerations.

Due-diligence items — not a default "safer/riskier than a stablecoin."

Practical guidance

1. Classify the instrument first — fund share vs stablecoin, never interchangeable.
2. Decide on yield-and-profile — fund mechanics vs payment-ready non-yield.
3. Diligence redemption/minimums/manager/custodian/wrapper per fund.
4. Account instrument-specifically — a fund interest ≠ a stablecoin line; neither auto-cash.
5. Treat fund size/yield as out-of-scope/changing — confirm current terms.
6. Confirm treatment with investment, legal, and accounting advisers.

Configuring a tool to classify it correctly

The recurring tokenized-fund error is bucketing the share as a stablecoin or as cash. Tools like Cryptio and Request Finance can tag a tokenized fund interest distinctly, but the default behaviour is what to check. Before you trust the books, confirm the tool:

• does not auto-classify a BUIDL/BENJI-class token as a stablecoin or a cash equivalent simply because it is a dollar-denominated token;
• tracks the fund interest's redemption route and yield mechanics as a distinct line, not merged with payment tokens;
• preserves an audit trail tying the holding to the specific fund and its NAV/conversion terms.

A tool that silently maps every dollar token to "cash/stablecoin" will misstate both the balance sheet and the treasury's risk view.

How Wag3s handles it

Wag3s Ledger classifies a tokenized money market fund interest distinctly from a stablecoin and from cash, tracks its yield and redemption mechanics, and keeps the instrument-specific audit trail, so a BUIDL/BENJI-class holding is accounted for as the fund interest it is rather than mislabelled as a stablecoin. See the Ledger product page and the Wag3s for accountants page.

Further reading

• Tokenized RWA Treasury (Ondo, BUIDL, BENJI)
• The GENIUS Act and Stablecoin Treasury
• Stablecoin Treasury Policy
• Stablecoin Accounting Treatment
• USDC vs USDT vs DAI for Treasury
• Stablecoin Treasury Accounting Controls

Sources

• IFRS Foundation — IFRS 9 Financial Instruments: the classification and measurement categories (amortised cost, FVOCI, FVTPL) that determine how a fund interest's value and accrued yield are recognised, and why a fund share is generally not cash.
• BUIDL and BENJI mechanics (BUIDL = BlackRock USD Institutional Digital Liquidity Fund, Securitize-managed, BNY Mellon custody, cash/Treasuries/repos, USDC conversion via Circle; BENJI = Franklin FOBXX, first US-registered tokenized MMF, tokenising the shareholder registry) are taken from the funds' own product documentation; fund size and yield figures change and are out of scope here.