aUSD / staUSD

Structured yield stablecoin system — concept overview
March 2026
Concept Paper v0.2
01 — Product Architecture
aUSD
SENIOR — T-BILL BACKED
Fully collateralized stablecoin backed 1:1 by US Treasury bills. Always redeemable at $1.00. No yield distributed to holders. Capital preservation as primary objective. Acts as senior tranche — paid first, protected first.
BackingUS T-Bills (3-month)
Peg$1.00 hard redemption
Max drawdown0.00%
Lending yieldT-bill rate (floating)
staUSD
JUNIOR — CLO BACKED
Received when aUSD is staked. Collateral rotates into JAAA/PAAA AAA CLO ETFs. All yield from T-bill and CLO layers flows to staUSD holders. Acts as junior tranche — absorbs all losses before aUSD is ever touched.
BackingAAA CLO ETFs (JAAA/PAAA)
Yield sourceCLO spread + T-bill pool
Worst annual return (JAAA)+0.53% (2022)
Indicative yield (looped)~9–11%
02 — Historical Yield: CLOs vs T-Bills
ANNUAL TOTAL RETURN (%)
JAAA vs 3-Month T-Bill — 2021 to 2025
JAAA
3M T-Bill
SPREAD OVER T-BILLS (BPS)
JAAA excess return — CLO complexity premium
Positive spread
Negative (2022 rate shock)
T-BILL YIELD (3M)
4.3%
Current / borrow rate
JAAA CLO YIELD
5.7%
Current
STRUCTURAL SPREAD
+140bps
Always positive historically
⚠ 2022 spread: JAAA returned +0.53% vs T-bills at +2.10% (−157bps spread). This was a one-off timing artifact — the Fed hiked from 0% to 4.5% in a single year, the fastest cycle in 40 years. T-bills repriced instantly (3-13 week maturity); CLO coupons reset quarterly. Importantly, JAAA still returned positive (+0.53%) in 2022 — outperforming every major bond fund (AGG: −13%, TLT: −31%). The intraday price dip of −2.64% was temporary and recovered in 107 trading days. On an annual total return basis, JAAA has never had a negative year since inception.
03 — Senior / Junior Tranche Structure
Tranche
Token
Yield
Loss absorption
Priority on redemption
Senior PROTECTED
aUSD lenders
T-bill rate (floating ~4.3%). Fixed to risk-free rate — always market competitive.
None. Losses absorbed entirely by junior before senior is touched.
First — T+0
Junior YIELD
staUSD holders
CLO spread amplified by leverage. ~9–11% at 5x. Compensation for taking first loss.
All CLO NAV drawdowns absorbed here first. staUSD value adjusts before aUSD is impacted.
Second — T+1
CAPITAL STACK (EXAMPLE: $100 POOL)
How losses flow through the structure
WHY THIS PROTECTS aUSD
With a 40% junior buffer, the system can absorb a 40% total loss on the CLO portfolio before aUSD holders lose a single dollar.
JAAA has never had a negative annual return since inception. Its worst year (2022) returned +0.53%. To impair aUSD at a 40% junior ratio, CLOs would need to sustain losses that have no historical precedent.
AAA CLO tranches have zero credit defaults in 30+ years including the 2008 GFC. The worst intraday price dip ever recorded was −2.64% (Jul 2022) — fully recovered in 107 trading days.
04 — The Leverage Loop
LOOP MECHANICS — USING OUR OWN LENDING MARKET, NOT EXTERNAL PROTOCOLS
01
Mint
Deposit USDC/USDT → mint aUSD at $1.00. Backed by T-bills.
02
Stake
Stake aUSD → staUSD. Collateral converts to JAAA CLOs.
03
Borrow
Deposit staUSD as collateral in our lending market. Borrow aUSD at T-bill rate.
04
Re-stake
Stake borrowed aUSD → more staUSD → more collateral.
05
Repeat
Each loop captures 140bps spread. Repeat up to protocol limit (5x).
BORROW COST (aUSD)
T-bill rate
Mirrors SOFR — no external dependency
EARN ON staUSD
T-bill + 140bps
JAAA CLO structural spread
NET SPREAD PER LOOP
+140bps
At 5x → ~700bps added yield
EFFECTIVE YIELD BY LEVERAGE MULTIPLE (BASE CLO YIELD: 5.7%)
Hover bars for detail — green zone recommended, amber zone caution
05 — Protocol Safety Limits
MAX LEVERAGE
5x
Hard protocol cap. The worst intraday price dip JAAA has ever recorded is −2.64% (Jul 2022). At 5x leverage, that intraday move causes −13.2% collateral erosion — well within the 88% liquidation buffer. Annual return that year was still +0.53%.
LTV CAP
80%
Maximum loan-to-value for staUSD collateral. Borrowing stops at 80% LTV. Liquidation triggered at 88% LTV — gives 8% buffer before liquidation fires.
LIQUIDATION THRESHOLD
88% LTV
If staUSD collateral value drops enough to push position above 88% LTV, protocol automatically begins unwinding the position to protect aUSD lenders.
JUNIOR BUFFER MIN
25%
Minimum ratio of staUSD (junior) to total pool. If junior buffer drops below 25%, new borrowing is paused until ratio recovers. Protects systemic solvency.
T-BILL RESERVE
20%
20% of all staked assets held in T-bills not CLOs. Instant liquidity for aUSD redemptions without waiting for CLO settlement (T+1). Replenished automatically.
SINGLE USER CAP
$5M
Per-address borrowing cap in early deployment. Prevents single large position from dominating the pool and creating systemic liquidation risk. Raised over time as TVL grows.
Oracle: Chainlink SOFR feed for T-bill rate (borrow cost). Janus Henderson published daily NAV for JAAA (attested by custodian) for CLO collateral value. Both feeds time-weighted over 1 hour to prevent manipulation. Circuit breaker pauses all liquidations if NAV feed deviates more than 5% in under 1 hour.
06 — Redemption Mechanics
aUSD Redemption — Senior
01
User submits redemption request for aUSD → $1.00
02
Protocol checks T-bill reserve buffer (20%) — if sufficient, redeems instantly from buffer
03
If buffer insufficient, request enters queue. T-bills mature or are sold (T+0 same day for most maturities)
04
USDC sent to user. Buffer auto-replenished from incoming deposits or CLO yield
staUSD Redemption — Junior
01
User submits redemption. Protocol checks for active borrows against this staUSD — must repay borrow first
02
If no borrow: SPV initiates JAAA sale on NYSE. T+1 settlement (next business day)
03
Proceeds flow from custodian → SPV → onchain. User receives USDC at current NAV price (not fixed $1.00)
04
Large redemptions (>$1M) enter queue — processed in order, max $5M/day to prevent market impact
07 — Loss Simulation
INTERACTIVE STRESS TEST
How the tranche structure protects aUSD holders across different scenarios
Pool assumptions: $100M total — $60M aUSD lenders (senior), $40M staUSD (junior). Click a scenario.
Normal conditions
2022 rate shock
Extreme stress (5x intraday worst)
Full cascade failure
CLO NAV CHANGE
+5.7%
TOTAL POOL VALUE
$105.7M
aUSD HOLDERS
$62.6M
staUSD HOLDERS
$43.1M
FlowAmountRecipient
T-bill yield on senior ($60M × 4.3%)+$2.58MaUSD lenders
CLO yield on junior ($40M × 5.7%)+$2.28MstaUSD holders
Additional loop yield (5x on $40M)+$2.24MstaUSD holders
aUSD lenders earn 4.3% (T-bill rate). staUSD holders earn ~11.3% total. Both tranches paid in full. No liquidations. System operating as designed.
CLO NAV CHANGE
−2.64% intraday
TOTAL POOL VALUE
$98.94M
aUSD HOLDERS
$60.00M
staUSD HOLDERS
$38.94M
FlowAmountWho absorbs
CLO portfolio loss ($100M × −2.64%)−$2.64MstaUSD (junior)
aUSD lenders — principal protected?$60M intactYes — fully protected
staUSD NAV impact$40M → $38.94M−6.6% on junior only
Recovery timeline (historical)107 trading daysFull recovery
This is JAAA's worst ever intraday price drawdown scenario (2022). Note: on a full-year total return basis JAAA returned +0.53% in 2022 — still positive. The intraday -2.64% only matters if staUSD holders are force-liquidated at the worst possible moment. aUSD holders: completely unaffected, $1.00 maintained. staUSD holders: temporary intraday NAV dip of 6.6% on their junior position, recovered in 107 trading days. Annual yield still positive.
CLO NAV CHANGE
−13.2%
TOTAL POOL VALUE
$86.8M
aUSD HOLDERS
$60.00M
staUSD HOLDERS
$26.8M
FlowAmountWho absorbs
CLO portfolio loss ($100M × −13.2%)−$13.2MstaUSD (junior)
aUSD lenders — principal protected?$60M intactYes — still fully protected
staUSD NAV impact$40M → $26.8M−33% on junior
Junior buffer remaining26.8% of poolAbove 25% min — pause triggered
5x the worst intraday price dip JAAA has ever recorded (completely hypothetical as a sustained loss — the actual 2022 annual return was still +0.53%). aUSD holders: still fully protected. staUSD holders: −33% temporary loss on their junior position. New borrowing paused (buffer near 25% minimum). System still solvent. aUSD never impaired. For context: this scenario requires CLOs to sustain a loss larger than anything in their 30+ year history on a permanent basis.
CLO NAV CHANGE
−40%
TOTAL POOL VALUE
$60M
aUSD HOLDERS
$60.00M
staUSD HOLDERS
$0
FlowAmountWho absorbs
CLO portfolio loss ($100M × −40%)−$40MstaUSD wiped out first
Junior buffer exhausted at−$40M lossstaUSD = $0
aUSD holders — principal protected?$60M exactlyBreakeven — peg intact
Context: what causes −40% CLO loss?Never happenedNot in 30yr history
Theoretical total failure of the junior tranche. Would require AAA CLO losses of 40% — which has never occurred in the 30+ year history of the CLO market, including the 2008 GFC where AAA tranches had zero defaults. At exactly this loss level, aUSD holders break even at $1.00. Beyond this point (loss > 40%), aUSD begins to depeg. This scenario requires a systemic structured credit collapse with no historical precedent.
LOSS WATERFALL — WHO ABSORBS WHAT AT EACH LOSS LEVEL
Junior tranche absorbs all losses up to 40% before aUSD is ever impacted
08 — JAAA Liquidity Analysis — Real Market Data
AVG DAILY VOLUME (MAR 2026)
$364M
7.2M shares × ~$50.50
VOLUME GROWTH (2yr)
+25x
$14M/day Apr'23 → $364M Mar'26
52-WEEK PRICE RANGE
$49.65–$50.85
Only $1.20 total swing
BID-ASK SPREAD
1–2 bps
Tighter than most bond ETFs
REAL AVG DAILY VOLUME ($M) — SOURCE: YAHOO FINANCE / YFINANCE API
JAAA monthly average daily dollar volume — Apr 2023 to Mar 2026
Calculated from actual daily volume × closing price, averaged per trading month. Data pulled directly from Yahoo Finance API.
DAYS TO LIQUIDATE PROTOCOL TVL
Conservative: using 10% of daily volume to avoid slippage
At $364M/day, 10% rule = $36M/day available. $20M T-bill buffer (20% of $100M TVL) handles first redemptions instantly before any JAAA sale needed.
REDEMPTION LIQUIDITY LAYERS
LAYER 1 — T-BILL BUFFER (INSTANT)
20% of pool held in T-bills. Handles all normal redemptions without touching JAAA. At $100M TVL = $20M instantly available. No market interaction needed.
LAYER 2 — JAAA MARKET SALE (T+1)
Sell JAAA on NYSE. At $364M real daily volume, selling $36M (10%) causes negligible price impact. T+1 settlement. Volume has grown 25x in 2 years — getting more liquid over time.
LAYER 3 — QUEUE FOR STRESS (RARE)
Large simultaneous redemptions queue at $5M/day cap. JAAA has never experienced a trading freeze in its 5-year history including Covid (2020) and the 2022 rate shock.
09 — Legal & Technical Structure
SPV / Custody
Cayman/BVI SPV holds JAAA + PAAA ETF shares via regulated custodian (State Street or equiv). Token represents pro-rata claim on SPV assets.
Oracle
Chainlink SOFR feed for borrow rate. Janus Henderson published daily NAV for JAAA collateral pricing. Both time-weighted 1hr to prevent manipulation. 5% deviation circuit breaker.
aUSD redemption
Against T-bill buffer — instant. Queue for large redemptions. Always $1.00. T-bill buffer auto-replenished from CLO yield and new deposits.
staUSD redemption
Via SPV → JAAA sale on NYSE → T+1 settlement. Must repay any open borrows first. NAV-priced not fixed. Large redemptions queued at $5M/day max.
Yield distribution
Monthly CLO coupons swept onchain via SPV attestation. T-bill yield distributed continuously. Both flow exclusively to staUSD holders (non-stakers subsidize stakers).
Target markets
Non-US: GCC, Southeast Asia, crypto-native. GENIUS Act restricts yield stablecoins for US persons. Cayman SPV is established precedent for RWA tokenization.
10 — Competitive Positioning
USDC / USDT
0%
No yield. Issuer captures all T-bill returns. No structured protection.
sUSDS (Sky)
~4.3%
T-bill backed. Solid but floating, no loop product, no CLO premium, no tranche structure.
Ethena (USDe)
~8–15%
High yield but funding rate flips negative. Delta exposure. Perp risk. Has gone to 0% in bear markets.
staUSD (looped)
~9–11%
Structural spread — never negative historically. AAA CLO backing. Senior/junior protection. Full-stack owned lending market. Spread is rate-neutral.