BLACKROCK BU vs MI4
BlackRock BUIDL and Mantle Index Four Fund, compared on the things that decide whether you get your dollar back. Live data, updated continuously.
30-day peg gap and BLACKROCK BU/MI4 spread
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BlackRock BUIDL issues dollar-denominated tokenized real-world assets across 8 chains. Value shown is on-chain assets under management.
Verdict band: Adequate
Mantle Index Four Fund issues dollar-denominated tokenized real-world assets across 1 chains. Value shown is on-chain assets under management.
Verdict band: Adequate
| Safety scoreComposite of collateral, peg, liquidity, issuer and track record. | ●●●●●5 of 5 | 66 | 62 | BLACKROCK BU |
|---|---|---|---|---|
| Collateral qualityWhat actually backs the token, and how liquid that backing is. | ●●●●●5 of 5 | 55 | 55 | Tie |
| Exit liquidityWhether you can leave at size without moving the price. | ●●●●●5 of 5 | $0.00 | $0.00 | Tie |
| Issuer & legal standingRegulatory perimeter, disclosure quality and redemption rights. | ●●●●4 of 5 | 48 | 48 | Tie |
| Peg tightness (live)Absolute distance from $1.00 right now — smaller is better. | ●●●●4 of 5 | 0.000% | 0.000% | Tie |
| Worst recorded depegHow badly the token has broken before, as a stress precedent. | ●●●●4 of 5 | None recorded | None recorded | Tie |
| Track recordYears live and behaviour through past stress events. | ●●●●4 of 5 | 53 | 53 | Tie |
| Scale / market capBigger float usually means broader venue support and tighter spreads. | ●●●3 of 5 | $3.55B | $119.28M | BLACKROCK BU |
| Chain reachNumber of networks where the token is natively deployed. | ●●●3 of 5 | 8 chains | 1 chains | BLACKROCK BU |
| Best available yieldUpside — but every extra point above T-bills is paid for with risk. | ●●2 of 5 | None | None | Tie |
"Matters" is our weighting of how much each dimension typically drives a real allocation decision. Sort any column to re-rank the tradeoffs by what matters to you.
The short answer
BLACKROCK BU scores higher on safety (66 vs 62), driven mainly by collateral quality and disclosure. BLACKROCK BU has deeper tracked liquidity ($0.00), which is what determines whether you can exit at size.
If both are fiat-reserve tokens, note that holding both is not diversification: they share the same short-dated Treasury and banking exposure. Genuine diversification means mixing collateral structures.
Which one fits your goal: BLACKROCK BU or MI4?
Capital preservation over everything else.
For park cash safely, BLACKROCK BU is the better fit over MI4.
- Safety score 66 vs 62, with collateral rated 55/100.
- Current peg deviation 0.000% against 0.000% for MI4.
- No material depeg recorded for BLACKROCK BU in our incident log.
Concentrating in one issuer is a single point of failure regardless of score. Split across collateral structures.
Key risks, side by side
BLACKROCK BU
- Issuer and banking risk: reserves sit with BlackRock BUIDL under Not documented rules.
- No depeg recorded in our incident log — absence of history is not a guarantee.
- Attestation cadence: monthly.
MI4
- Issuer and banking risk: reserves sit with Mantle Index Four Fund under Not documented rules.
- No depeg recorded in our incident log — absence of history is not a guarantee.
- Attestation cadence: monthly.
- Chain concentration: 100% of supply sits on Mantle.
| Metric | BLACKROCK BU | MI4 |
|---|---|---|
| Category | Tokenized Treasury | Tokenized Treasury |
| Issuer | BlackRock BUIDL | Mantle Index Four Fund |
| Jurisdiction | Not documented | Not documented |
| Collateral | treasuries | treasuries |
| Peg mechanism | asset-backed | asset-backed |
| Attestation | monthly | monthly |
| Redemption | gated | gated |
| Price | $1.0000 | $1.0000 |
| Peg deviation | 0.000% | 0.000% |
| Market cap | $3.55B | $119.28M |
| 7d supply change | +0.48% | +0.59% |
| Liquidity | $0.00 | $0.00 |
| Best yield | None | None |
| Chains | 8 | 1 |
| Launched | — | — |
| Worst recorded depeg | None recorded | None recorded |
Spread, peg gap and switching cost
- Price spread (BLACKROCK BU vs MI4)
- +0.0 bps
- $1.0000 vs $1.0000
- Peg deviation gap
- 0.000 pp
- BLACKROCK BU 0.000% · MI4 0.000%
- Yield spread
- +0.00%
- BLACKROCK BU — · MI4 —
- Liquidity ratio
- —
- $0.00 vs $0.00
A round trip between BLACKROCK BU and MI4 costs roughly the market spread plus venue fees. At 0.0 bps of price gap, swapping $1M implies about $0.00 of price impact before fees — usually only worth it if the peg gap or yield spread is durable, not intraday noise.
Chain coverage
BLACKROCK BU is live on 8 chains, MI4 on 1. 0 chains carry both, so bridging is only unavoidable for the 9 networks where just one of them is deployed.
| Chain | BLACKROCK BU | MI4 | Both available |
|---|---|---|---|
| $1.19B | — | BLACKROCK BU only | |
| $821.92M | — | BLACKROCK BU only | |
| $741.42M | — | BLACKROCK BU only | |
| $634.39M | — | BLACKROCK BU only | |
| — | $119.28M | MI4 only | |
| $111.06M | — | BLACKROCK BU only | |
| $26.37M | — | BLACKROCK BU only | |
| $13.48M | — | BLACKROCK BU only | |
| $8.54M | — | BLACKROCK BU only |
BLACKROCK BU vs MI4: frequently asked questions
Is BLACKROCK BU or MI4 safer?
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On our composite safety score BLACKROCK BU rates 66/100 versus 62/100 for MI4. The score weighs collateral quality (treasuries vs treasuries), redemption rights, attestation quality, peg history and liquidity depth. A higher score is not a guarantee: both remain issuer-credit and smart-contract exposures, not insured bank deposits.
What is the difference between BLACKROCK BU and MI4?
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BlackRock BUIDL is issued by BlackRock BUIDL (Not documented), backed by treasuries, with redemption terms: gated. Mantle Index Four Fund is issued by Mantle Index Four Fund (Not documented), backed by treasuries, with redemption terms: gated. Attestation coverage is "monthly" for BLACKROCK BU and "monthly" for MI4.
Which has the bigger market cap, BLACKROCK BU or MI4?
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BLACKROCK BU is larger at $3.55B in circulating supply, against $119.28M for the other. Over the last 7 days supply moved +0.48% for BLACKROCK BU and +0.59% for MI4.
Are BLACKROCK BU and MI4 trading at $1.00 right now?
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BLACKROCK BU trades at $1.0000 (0.000% off peg) and MI4 at $1.0000 (0.000% off peg). The gap between the two is about 0.0 basis points, which is the cost you pay when rotating size between them before fees.
Has BLACKROCK BU or MI4 ever depegged?
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BLACKROCK BU: no material depeg recorded in our incident set. MI4: no material depeg recorded in our incident set. Past peg behaviour under stress is the single best available proxy for how a token trades in the next crisis.
Which is better for large institutional size, BLACKROCK BU or MI4?
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For block size the constraint is exit liquidity and primary redemption, not headline supply. BLACKROCK BU shows deeper on-chain liquidity at $0.00 versus $0.00. Combine that with the redemption channel — BLACKROCK BU: gated; MI4: gated — and size trades against the primary window rather than the order book where possible.
Can I earn yield on BLACKROCK BU or MI4?
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Neither BLACKROCK BU nor MI4 currently has a tracked yield venue in our dataset. Holding either in a wallet pays nothing; any advertised rate comes from lending or liquidity provision on top, with its own risk.
Which chains support both BLACKROCK BU and MI4?
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They currently share no common network in our data: BLACKROCK BU is deployed on 8 chain(s) and MI4 on 1. Moving between them requires a bridge or a centralised venue.
What does it cost to switch from BLACKROCK BU to MI4?
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Budget three components: the current price spread of roughly 0.0 bps, swap or venue fees, and slippage against available depth ($0.00 for BLACKROCK BU, $0.00 for MI4). For meaningful size, redeeming with the issuer and minting the other side is often cheaper than a secondary-market swap.
Is BLACKROCK BU or MI4 regulated?
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BLACKROCK BU is issued from Not documented with monthly; MI4 is issued from Not documented with monthly. Regulatory status varies by your own jurisdiction and by whether the token is offered under a specific stablecoin regime, so treat this as a starting point for diligence, not legal advice.