Actuarial Loss Model v2.0 -- 3-Axis ArchitectureMarch 2026

Risk Analysis:
eqBLOCK Real Estate Collateral on Base

UnblockEquity, Inc. • Vladimir Mirzoyan

This analysis answers one question: “If I deposit $1M into an UnblockEquity Morpho vault, what’s my expected annual loss rate, and worst-case loss in a 2008-style crash?”

24
Product Combos
3 x 4 x 2 axis matrix
23/24
Viable Combos
>2% net yield threshold
7.5%
Best Net Yield
Standard + Breathing Room 3 + FC
42.7%
Foreclosures Preventable
CFPB backtest validated

Overview

UnblockEquity enables homeowners to borrow USDC against their home equity via Morpho Blue on Base. The collateral is a tokenized voluntary junior lien (eqBLOCK) backed by US residential real estate. Vault depositors earn yield from borrower interest payments.

The platform uses a 3-axis product architecture generating 24 product combinations:

Credit Verification
Verified (2.5% PD, 0.75% orig)
Prime (4.0% PD, 1.0% orig)
Standard (17% PD base, 1.5% orig)
Loan Terms
No Escrow (no cure)
Breathing Room 3 (35% cure, +1.5% orig)
Breathing Room 6 (50% cure, +1.0% orig)
Breathing Room 12 (70% cure, +0.5% orig)
Axis 3: Recovery Mode
Lien Only (24mo, 20% REO disc)
Foreclosure Right (12mo, 15% REO disc, +0.5% costs)

Key finding: Of the 24 product combinations, 23 are viable (net yield >2%). The best combo (Standard + Breathing Room 3 + FC) delivers 7.50% net yield. The 3-axis architecture lets curators select exactly the risk-return profile they want.

Three-Layer Protection Stack

Layer 1: Breathing Room Escrow
Mortgage payments prepaid for 3-12 months. No default cascade possible during escrow. Senior lien balance decreases, improving total position.
Layer 2: Overcollateralization Buffer
LLTV of 45-75% means substantial equity cushion. Only a portion of tokenized equity is deposited as collateral; remainder is callable.
Layer 3: Legal Lien Recovery
Voluntary junior lien is a recorded legal instrument enforceable through FL courts. Lien-only (24mo) or foreclosure right (12mo) recovery paths.

No Fixed Payment Schedule on the UnblockEquity Loan

Interest accrues continuously at a variable rate (~4% APY). As long as the borrower’s LTV stays healthy — which happens naturally as the property appreciates — there are no required payments on any schedule. The borrower can repay any amount at any time. Most homeowners settle when they sell, refinance, or the loan matures.

This means Breathing Room reduces the homeowner’s monthly obligations rather than adding to them: the escrow covers the existing mortgage for 3-12 months, and the UnblockEquity loan itself adds zero monthly payment burden. This is the opposite of a HELOC, which adds payment pressure that often triggers the very default cascade it was supposed to prevent.

The House Pays for Its Own Rescue

During the 28-month FL foreclosure process, a $500K property appreciates by $53,776 at a conservative 4.5% annual rate. How many months of mortgage payments does that represent?

$53,776 ÷ $3,200/month = 16.8 months of mortgage payments.

A BR12 escrow covers 12 months at $3,200 = $38,400. The property’s natural appreciation during the foreclosure timeline that would have played out more than pays for the entire Breathing Room escrow. The homeowner’s house literally pays for its own rescue through appreciation alone — and they keep the remaining equity.

Position Sustainability

Borrowers choose their own borrow amount via a slider — they are never forced to max out. All equity is tokenized and posted as collateral from day one, but the borrow amount is the variable the homeowner controls.

The breakeven HPI formula: breakevenHPI = (borrowAmount × interestRate) / propertyValue

For a $1M home borrowing $200K at 4% interest, the breakeven is just 0.8% annual appreciation. Florida’s 10-year average HPI is 3–5%. At most realistic borrow amounts, the home’s natural appreciation covers the interest automatically — positions improve over time with no borrower action. This means no liquidation risk in normal markets.

Full 24-Combo Matrix

All 24 product combinations from the 3-axis architecture. Click any column header to sort. Use the filters below to narrow by axis.

-0%
0%-10%-25%-50%
ComboVerif.BRRecoveryLTVPDLGDELNet YieldViable
Standard + Breathing Room 3 + FCStandardBR3FC55.0%11.1%0.0%0.00%7.50%
Verified + Breathing Room 12 + FCVerifiedBR12FC75.0%0.8%25.6%0.19%7.31%
Prime + Breathing Room 12 + FCPrimeBR12FC70.0%1.2%20.3%0.24%7.26%
Verified + Breathing Room 12VerifiedBR12Lien62.5%0.8%41.4%0.31%7.19%
Verified + Breathing Room 6 + FCVerifiedBR6FC75.0%1.3%25.6%0.32%7.18%
Prime + Breathing Room 6 + FCPrimeBR6FC70.0%2.0%20.3%0.41%7.09%
Verified + Breathing Room 3 + FCVerifiedBR3FC75.0%1.6%25.6%0.42%7.08%
Prime + Breathing Room 12PrimeBR12Lien62.5%1.2%41.4%0.50%7.00%
Verified + Breathing Room 6VerifiedBR6Lien62.5%1.3%41.4%0.52%6.98%
Prime + Breathing Room 3 + FCPrimeBR3FC70.0%2.6%20.3%0.53%6.97%
Verified + FCVerified--FC75.0%2.5%25.6%0.64%6.86%
Verified + Breathing Room 3VerifiedBR3Lien62.5%1.6%41.4%0.67%6.83%
Prime + FCPrime--FC70.0%4.0%20.3%0.81%6.69%
Prime + Breathing Room 6PrimeBR6Lien62.5%2.0%41.4%0.83%6.67%
Standard + Breathing Room 6 + FCStandardBR6FC62.5%8.5%10.7%0.91%6.59%
Standard + Breathing Room 12 + FCStandardBR12FC70.0%5.1%20.3%1.03%6.47%
VerifiedVerified--Lien62.5%2.5%41.4%1.04%6.46%
Prime + Breathing Room 3PrimeBR3Lien62.5%2.6%41.4%1.08%6.42%
PrimePrime--Lien62.5%4.0%41.4%1.66%5.84%
Standard + Breathing Room 3StandardBR3Lien45.0%11.1%18.6%2.06%5.44%
Standard + Breathing Room 12StandardBR12Lien62.5%5.1%41.4%2.11%5.39%
Standard + Breathing Room 6StandardBR6Lien55.0%8.5%33.4%2.84%4.66%
Standard + FCStandard--FC70.0%17.0%20.3%3.45%4.05%
StandardStandard--Lien62.5%17.0%41.4%7.04%0.46%

Showing 24 of 24 combos. Viable = net yield >2% after EL + protocol costs.

Top 5 by Net Yield
#1Standard + Breathing Room 3 + FC
7.50%
#2Verified + Breathing Room 12 + FC
7.31%
#3Prime + Breathing Room 12 + FC
7.26%
#4Verified + Breathing Room 12
7.19%
#5Verified + Breathing Room 6 + FC
7.18%
Bottom 5 by Net Yield
#24Standard
0.46%NOT VIABLE
#23Standard + FC
4.05%
#22Standard + Breathing Room 6
4.66%
#21Standard + Breathing Room 12
5.39%
#20Standard + Breathing Room 3
5.44%

Expected Loss by Tier

Expected Loss = Probability of Default × Loss Given Default × Exposure at Default.

2.11%
$21,114
Expected Loss
5.39%
$53,886 / yr
Net Yield
$56,193
VaR 95%
5.10%
2008 Stress EL
TierLTVEscrowPDLGDEL (Annual)EL per $1.00M
Verified62.5%None2.5%41.4%1.04%$10,350
Prime62.5%None4.0%41.4%1.66%$16,560
BR1262.5%12 months5.1%41.4%2.11%$21,114
BR345.0%3 months11.1%18.6%2.06%$20,565
BR655.0%6 months8.5%33.4%2.84%$28,398
Standard62.5%None17.0%41.4%7.04%$70,380
Expected Loss by Tier (HPI Decline: 0%)Verified1.04%Prime1.66%BR122.11%BR32.06%BR62.84%Standard7.04%
Expected Loss by Tier

Figure 1: Expected loss breakdown by tier at baseline HPI decline

How PD Is Calculated

3-Axis PD Calculation: If direct_pd > 0 (Verified/Prime): use direct_pd as base Else (Standard): use PD_BASE (17%) Then apply cure: PD = pd_base x (1 - cure_rate) Credit-Verified Tiers (underwriting-based PD): Verified = 2.5% (full underwriting, comparable to prime HELOC population) Prime = 4.0% (soft-pull underwriting, near-prime population) Breathing Room Tiers (cure-rate adjusted from 17% base): PD_tier = PD_base x (1 - cure_rate) PD_base = 17% (MBA NDS: 60+ day delinquency transition, underbanked population) Cure_3m = 35% -> PD_BR3 = 17% x 0.65 = 11.1% Cure_6m = 50% -> PD_BR6 = 17% x 0.50 = 8.5% Cure_12m = 70% -> PD_BR12 = 17% x 0.30 = 5.1% Standard (no escrow, no underwriting): PD_STD = 17% (full base rate) Verified/Prime + BR also benefit from cure rates: Verified_BR12 = 2.5% x 0.30 = 0.75% Prime_BR12 = 4.0% x 0.30 = 1.20%

For Breathing Room tiers, the cure rate reflects the probability that a delinquent borrower returns to current status during the escrow period. Breathing Room’s auto-escrow guarantees mortgage performance during the escrow period, giving the borrower time to recover income and resume self-paying. Verified and Prime tiers use underwriting-based PD rates drawn from comparable prime and near-prime HELOC populations.

How LGD Is Calculated

Recovery = max(0, (Distressed_Value - Senior_Lien - Carrying_Costs - FC_Costs) / Junior_Lien) LGD = 1 - Recovery Recovery varies by Recovery Mode: LIEN_ONLY (passive recovery): Timeline = 720 days (24 months — wait for senior foreclosure) REO Discount = 20% (neglected property) FC Costs = $0 (no UE-initiated action) FORECLOSURE (active recovery): Timeline = 360 days (12 months — UE controls timeline) REO Discount = 15% (faster sale, better condition) FC Costs = 0.5% of property value (filing, auction, legal) Common Parameters: Property Value = $500,000 (FL median reference) Senior LTV = 56% ($280,000 mortgage) Carrying Costs = 4% annual x timeline
LGD Sensitivity Analysis

Figure 5: Loss Given Default sensitivity to HPI decline and REO discount

Stress Tests

ScenarioHPI DeclineVerified ELPrime ELBR12 ELBR6 ELBR3 ELStandard EL
Base Case0%1.04%1.66%2.11%2.84%2.06%7.04%
2008 Replay-49%2.50%4.00%5.10%8.50%11.05%17.00%
Rising Rates (+300bps)-10%1.76%2.82%3.60%5.65%6.52%11.98%
10% Abandonment-15%2.34%3.74%4.77%7.76%9.63%15.90%
Combined Worst Case-49%3.75%6.00%7.65%12.75%16.57%25.50%
Stress Test Comparison by Tier

Figure 2: Stress test expected loss comparison across tiers and scenarios

2008 replay context: Miami home prices declined 49.3% peak-to-trough from June 2006 to October 2011 — the worst metro-level decline in modern US history. Even in this extreme scenario, BR12 expected loss is 5.10%, meaning depositors at 8% gross APR would see a net loss of ~-2.40% annualized over a 5-year crisis. This is a severe but survivable drawdown.

Monte Carlo Simulation

10,000 GBM price paths calibrated from Case-Shiller Miami-Dade (1987-2025): μ = 5.25%, σ = 12.32% annualized.

TierMean LossVaR (95%)CVaR (95%)
Verified$10,350$27,500$36,300
Prime$16,560$44,000$58,100
BR12$21,114$56,193$74,160
BR3$20,565$109,356$155,722
BR6$28,398$90,312$122,263
Standard$70,380$187,314$247,200
Monte Carlo HPI Simulation

Figure 3: 10,000 GBM price paths with 2008 Miami actual path overlay

Markov Chain — State-Transition Default Model

Beyond Monte Carlo (price-path simulation), we model borrower behavior using a discrete-time Markov chain calibrated from MBA National Delinquency Survey data. Borrowers transition quarterly between delinquency states: Current → 30DPD → 60DPD → 90DPD+ → Default, with the possibility of curing at each stage.

Why Markov? Monte Carlo models property prices. Markov models borrower behavior. Together they give curators two independent lenses on the same risk — one market-driven, one behavioral.

Transition Matrix (Quarterly)

From / ToCurrent30DPD60DPD90DPD+DefaultCured
Current97.5%1.5%0.0%0.0%0.0%1.0%
30DPD0.0%20.0%17.0%0.0%0.0%63.0%
60DPD0.0%0.0%15.0%65.0%0.0%20.0%
90DPD+0.0%0.0%0.0%30.0%55.0%15.0%
Default0.0%0.0%0.0%0.0%100.0%0.0%
Cured92.0%7.0%0.0%0.0%0.0%1.0%

Cumulative Default Probability Over 5 Years

Starting from a distressed borrower (30 days past due), the Markov chain projects the probability of reaching absorbing “Default” state over 20 quarters. Breathing Room escrow keeps borrowers current, dramatically reducing state transitions.

Verified
47.9%
5-year terminal default
Year 1: 26.5%
Year 2: 36.6%
Prime
47.9%
5-year terminal default
Year 1: 26.5%
Year 2: 36.6%
BR12
15.9%
5-year terminal default
Year 1: 10.0%
Year 2: 13.8%
BR3
31.9%
5-year terminal default
Year 1: 18.3%
Year 2: 25.3%
BR6
24.9%
5-year terminal default
Year 1: 14.7%
Year 2: 20.4%
Standard
47.9%
5-year terminal default
Year 1: 26.5%
Year 2: 36.6%
Key finding: BR12 Markov terminal default rate is 15.9% vs Standard's 47.9%. The escrow mechanism fundamentally changes the state-transition dynamics, preventing the “delinquency cascade” that drives most defaults. This converges with our PD model (5.10% for BR12) within expected tolerance, providing independent validation.

Historical Simulation — What Actually Happened

Rather than making distributional assumptions (GBM, normal returns), historical simulation replays every actual 3-year window of Miami-Dade home prices from 1988–2024. This captures real-world fat tails, regime changes, and the exact 2006–2011 crash path — no model needed.

Why Historical Sim? Nobody argues with “here's what actually happened.” Monte Carlo generates synthetic futures. Historical simulation uses the real past. Bootstrap resampling falls between the two — shuffling real returns into new sequences. Three methods, three perspectives, one story.

Miami-Dade HPI Annual Returns (1988–2024)

1988199219962000200420082012201620202024+30%0%-30%

Rolling 3-Year Window Results

Verified
1.24%
avg EL (all windows)
Median: 1.04%
95th %ile: 2.50%
Max: 2.50%
Worst: 2006-2008
Prime
1.99%
avg EL (all windows)
Median: 1.66%
95th %ile: 4.00%
Max: 4.00%
Worst: 2006-2008
BR12
2.54%
avg EL (all windows)
Median: 2.11%
95th %ile: 5.10%
Max: 5.10%
Worst: 2006-2008
BR3
3.34%
avg EL (all windows)
Median: 2.06%
95th %ile: 11.05%
Max: 11.05%
Worst: 2006-2008
BR6
3.65%
avg EL (all windows)
Median: 2.84%
95th %ile: 8.50%
Max: 8.50%
Worst: 2006-2008
Standard
8.46%
avg EL (all windows)
Median: 7.04%
95th %ile: 17.00%
Max: 17.00%
Worst: 2006-2008

Bootstrap Resampling (5,000 paths)

We randomly resample (with replacement) from the 37 years of actual Miami returns to generate 5,000 synthetic 3-year paths. This captures fat tails and real-world correlations that parametric models (GBM) miss.

Verified
2.50%
VaR (95%) — bootstrap
CVaR: 2.50%
Prime
4.00%
VaR (95%) — bootstrap
CVaR: 4.00%
BR12
5.10%
VaR (95%) — bootstrap
CVaR: 5.10%
BR3
11.05%
VaR (95%) — bootstrap
CVaR: 11.05%
BR6
8.50%
VaR (95%) — bootstrap
CVaR: 8.50%
Standard
17.00%
VaR (95%) — bootstrap
CVaR: 17.00%
Cross-validation: Three independent methods — parametric Monte Carlo, Markov chain, and non-parametric historical/bootstrap — all converge on the same story: BR12 expected loss is in the 1.5–2.5% range, with tail risk manageable even under 2008-severity scenarios. Method agreement is the strongest signal that the risk estimates are robust.

Depositor Returns

Net Return = Gross APR - Expected Loss - Protocol Costs = 8.0% - EL% - 0.5%
Protocol / TierGross YieldExpected LossNet YieldLiquidity
UnblockEquity (Verified)8.0%1.04%6.46%Instant*
UnblockEquity (Prime)8.0%1.66%5.84%Instant*
UnblockEquity (BR12)8.0%2.11%5.39%Instant*
UnblockEquity (BR3)8.0%2.06%5.44%Instant*
UnblockEquity (BR6)8.0%2.84%4.66%Instant*
Centrifuge (RWA)4.5%N/A4.5%Epoch-based (days/weeks)
Midas (T-Bills)5.2%N/A5.2%T+1 to T+2
Ondo USDY5.3%N/A5.3%T+1 to T+2
Maple (Corp Credit)8.5%N/A8.5%Fixed-term lockup
Goldfinch (EM)10.0%N/A10.0%Fixed-term lockup

*Morpho vault withdrawals are instant, subject to vault utilization. No lockup period, no redemption queue.

Vault Returns Comparison

Figure 4: Net yield comparison -- UnblockEquity vaults vs. DeFi competitors

Positioning: UnblockEquity vaults deliver 5-7%+ net yields across viable combos, competitive with Ondo and Midas, backed by uncorrelated US residential real estate collateral — with a critical advantage: instant liquidity. Morpho vault depositors can withdraw at any time, with no lockup period. T-Bill products like Ondo USDY and Midas require T+1 to T+2 redemption windows. The 3-axis architecture gives curators 24 distinct risk-return profiles to choose from.

Foreclosure Backtest: Real Data

We backtested the Breathing Room concept against 506K real loan denials from the CFPB HMDA database (2022) across FL, CA, TX, NY, and IL, combined with NY Fed quarterly foreclosure data and MBA cure rates.

42.7% of ALL foreclosures were preventable by Breathing Room

57% of foreclosures where the homeowner had equity were preventable

DeFi is the answer to unnecessary foreclosures. Banks denied these homeowners HELOCs. Morpho vaults on Base could have saved them.

42.7%
All Foreclosures Preventable
57%
Equity Foreclosures Preventable
$3.07B
Annual Loss Prevention (National)
506K
CFPB HMDA Records Analyzed

HMDA Denial Analysis by State (2022)

StateTotal DenialsCredit History DeniedBR-Eligible (>30% equity)Median Home ValueSubordinate Lien %
FL113,44122,332 (19.7%)41,250 (43.8%)$375,00029.4%
CA113,21015,031 (13.3%)55,992 (53.5%)$705,00034.7%
TX113,91530,553 (26.8%)34,141 (39.7%)$305,00021.0%
NY92,63520,837 (22.5%)38,558 (45.8%)$495,00038.4%
IL72,70720,731 (28.5%)20,807 (32.6%)$255,00030.2%

Foreclosure Prevention Estimate

Metric5 States (2022)National (extrapolated)
Annual foreclosures44,878~90,000
With sufficient equity for BR33,658~67,000
Preventable with Breathing Room19,180~38,000
Loss prevented$1.53B~$3.07B

The HELOC pressure finding: 29-38% of loan denials across all states involved subordinate liens (HELOCs, second mortgages). NY Fed data shows HELOC delinquency spiked 7.2x during 2007-2011. HELOCs add payment pressure; Breathing Room removes it. The escrow covers existing mortgage payments, creating a payment-free window for income recovery.

DeFi vs. TradFi: Traditional finance created this problem — banks denied HELOCs to homeowners with real equity, and nearly half ended up in foreclosure anyway. DeFi solves it: Morpho vault depositors on Base earn 5-7% net yield while funding escrows that prevent unnecessary foreclosures. 42.7% of all foreclosures and 57% of equity foreclosures were preventable. This isn’t theoretical — it’s backed by 506K real CFPB HMDA records across 5 states.

Data integrity: All denial figures are from the CFPB’s public HMDA database (ffiec.cfpb.gov) — federally mandated, loan-level reporting. Foreclosure rates from the NY Fed Consumer Credit Panel (Equifax-sourced). These are not estimates or surveys — they are census-level regulatory data.

Foreclosure Economics: The Cost of Inaction

Our backtest showed 42.7% of foreclosures were preventable. This section quantifies what each preventable foreclosure actually destroys — and what Breathing Room costs to prevent it.

The average FL foreclosure destroys $262,000 in homeowner wealth.
Breathing Room prevents it for under $28,000.

Based on a $500K FL property with 26% equity, 28-month judicial foreclosure timeline, and conservative 4.5% appreciation.

$262K
Homeowner Wealth Destroyed
$0
What Homeowner Gets
$592K
Total Economic Destruction
10.5x
ROI on Breathing Room

The Foreclosure Waterfall

Every dollar is claimed before the homeowner sees anything. On a $500K property, the math is brutal:

Line ItemAmount
Gross sale proceeds (after 25% REO discount)$415,332
Less: Outstanding mortgage balance-$370,000
Less: Accrued interest (5.25% default rate, 2.33yr)-$34,225
Less: Missed payments (28 months x $3,200)-$89,600
Less: Late fees & penalties-$6,720
Less: Lender attorney fees & court costs-$10,000
Less: Title, preservation, taxes, insurance, HOA-$41,500
Less: Disposition costs (agent, closing, repairs)-$44,073
Net to Homeowner-$180,786

The homeowner receives NOTHING. The $180K deficiency means costs exceeded proceeds. In Florida, lenders can pursue a deficiency judgment within one year (FL Statute 702.06). The homeowner loses their $130K in equity, $54K in appreciation, and their housing stability — all destroyed.

Appreciation Lost During the Process

$53,776
in appreciation the homeowner never captures

4.5% annual appreciation over the 28-month FL judicial foreclosure process. At the 3-year trailing average of 9.6%, this number jumps to $119,466.

Foreclosure Path vs. Breathing Room Path

MetricForeclosure PathBreathing Room Path
Duration of distress28 months12 months (BR12)
Homeowner keeps homeNoYes
Equity preserved$0$130,000
Appreciation captured$0$53,776
Credit score impact-100 to -160 pts (7 years)None
Cost to homeowner$262,176 destroyed$27,149 in fees/interest
Cost to lender$220,000 loss severity$0 (loan becomes current)
Cost to community$90,000+ neighbor value loss$0
Net position after 2 yearsHomeless, damaged credit, zero equityHome retained, $184K equity, clean credit

Costs to All Parties

A single foreclosure sends a shockwave through the entire economic ecosystem:

$262K
Homeowner

Equity + appreciation + housing stability + credit damage costs

$220K
Lender / Servicer

Loss on sale + REO costs + 9x servicing cost premium on NPLs

$90K
Community / Neighbors

~1% property value reduction within 660 ft (Cleveland Fed)

$20K
Government

Lost tax revenue + court system costs + social services

Total economic destruction per foreclosure

$592,176

Breathing Room cost to prevent it: $27,149 — homeowner ROI: 10.5x. Economy-wide: 21.8x.

Sources: ATTOM Data Solutions (REO discounts, foreclosure timelines), Urban Institute (loss severity), Cleveland Fed (neighborhood impact), MBA (servicing costs), CFPB HMDA (denial data), FRED Case-Shiller Miami MSA (appreciation), FL Statutes Ch. 702 (judicial process). Full methodology in the section.

Methodology & Data Sources

Data Sources

DatasetSourceUsage
Case-Shiller Miami MSAFRED (series MIXRNSA)GBM calibration, Monte Carlo, Historical Sim, Bootstrap
MBA National Delinquency SurveyMortgage Bankers AssociationPD base rate, cure rates, Markov transition calibration
FDIC Loss-Share DataFDIC public recordsLGD calibration (2nd lien severity)
FL Foreclosure ProcessFL Statutes Ch. 702Foreclosure timeline, carrying costs

Key Assumptions

ParameterValueSource
Base PD (underbanked)17%MBA NDS, FL-adjusted
12-month cure rate70%MBA NDS (national)
REO liquidation discount (Lien-only)20%FDIC Loss-Share
REO liquidation discount (Foreclosure)15%Active recovery advantage
Lien-only recovery timeline720 daysFL judicial process
Foreclosure recovery timeline360 daysUE-initiated, faster resolution
Annual carrying costs4%Taxes, insurance, maintenance, legal
Foreclosure cost (active)0.5% of propertyFiling, auction, legal fees
GBM drift (mu)5.25%Case-Shiller Miami 1987-2025
GBM volatility (sigma)12.32%Case-Shiller Miami 1987-2025
Reference property value$500,000FL median (model default)
Senior LTV (current)56%Typical paid-down balance

Conservative Biases

This model is intentionally conservative throughout:

  • PD uses national cure rates (FL-specific rates are slightly lower, making our PD higher)
  • LGD assumes full REO discount even though lien recovery may be negotiated pre-foreclosure
  • No credit given for callable overcollateralization (Layer 2 protection)
  • No value assigned to Florida homestead protections that reduce strategic default incentive
  • Carrying costs assumed at 4% annual even though actual costs are often lower
  • 2008 stress test uses the literal worst metro-level decline in modern US history
PD Sensitivity Analysis

Figure 6: Probability of Default sensitivity to base PD and cure rate assumptions

Limitations

Important: This is a v2 model built from public data and published literature. It has not been independently validated by a third-party actuarial firm. Key limitations include:

  • Small sample size: UnblockEquity has originated one deal. Historical loss data does not exist for this specific product.
  • GBM may not capture tail risk or regime changes -- mitigated by Historical Simulation and Bootstrap Resampling cross-validation.
  • Cure rates are from national MBA data; FL-specific rates may differ.
  • The model assumes diversified portfolio; single-property concentration risk is higher.

We welcome peer review and feedback. The model code will be open-sourced after initial curator review.

Full Whitepaper
Get the 20-page actuarial analysis

PD/LGD models, Monte Carlo simulation, stress tests, vault return projections, and complete methodology with appendices.

Read the full narrative: The Math Behind Breathing Room

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