| Node |
Subject |
Primary Metric |
SFC Typology |
Source |
N |
μ |
σ |
24000 Destination |
Terminal Z (Q4 2025) |
| 21310 |
Taxation & Revenue Policy |
\(NRTTB_t\) |
Capital Constraint |
ABS GFS 5512.0 |
60 |
0.000777 |
0.000062 |
SPCI 24800 |
−0.034σ |
| 21320 |
Planning & Zoning Policy |
\(PSPR_t\) |
Supply Friction |
ABS 8731.0 T11 |
60 |
0.4125 |
0.0521 |
RLV Gap 24410 · RCG 24450 |
+0.188σ |
| 21330 |
Social Housing Policy |
\(SHSI_t\) |
Supply Friction |
AIHW NHADR |
60 |
4.6022% |
0.2331% |
SPCI 24800 |
−1.460σ |
| 21340 |
Foreign Investment Policy |
— |
INACTIVE |
APN-GOV-21340-FIPP-001 |
— |
— |
— |
→ FCCI (24000, pending) |
— |
| 21350 |
Macroprudential Lending Regulation |
\(RBCI_t\) |
Capital Constraint |
APRA sovereign |
60 |
0.8756 |
0.1483 |
CRI 24230 · RVM 24210 |
−1.409σ |
| 21360 |
Environmental Compliance |
\(ECCP_t\) |
Supply Friction |
ABCB NCC / Rawlinsons |
60 |
1.2097% |
1.0659% |
RCG 24450 · CRADI 24500 |
+2.074σ |
| 21370 |
Tenancy & Consumer Protection |
\(LOCI_t\) |
Yield Friction |
State Acts (VIC/NSW/QLD) |
60 |
55.4202 |
54.5254 |
SPCI 24800 |
+1.276σ |
No Series-Level Composite: The 21300 Series does not produce a series-level composite index. Each node routes directly and independently into its designated 24000 Series instrument. Aggregating structurally disparate friction vectors — capital constraint (21310, 21350), supply friction (21320, 21330, 21360), and yield friction (21370) — would produce analytical noise rather than signal.
| Parameter | Value | Status |
|---|
| Primary metric | \(NRTTB_t = \dfrac{\text{Stamp Duties}_t}{\text{Transaction Value}_t}\) | Ratified |
| SFC Typology | Capital Constraint | APN-GOV-21300-SFC-001 |
| Numerator source | ABS GFS 5512.0 — Stamp duties on conveyances | Annual FY 2014-15 to 2023-24 |
| Denominator source | Residential transaction value (quarterly) | Gemini processed |
| Construction method | FY interpolation (known) + EATR extrapolation (tails) | Directive applied |
| EATR (known period) | 0.0775% | 2014-Q3 to 2024-Q2 |
| μ | 0.000777 (0.0777%) | N=60 |
| σ | 0.000062 | N=60 |
| Interpolated core | 40 quarters (2014-Q3 to 2024-Q2) | Sovereign GFS data |
| EATR tail quarters | 20 quarters (carry forward at 0.000775) | DL-21310-002 |
| Terminal \(NRTTB_t\) (Q4 2025) | 0.000775 | EATR extrapolation |
| Terminal Z-Score (Q4 2025) | −0.0344σ | EATR — use Q2 2024 signal |
| Substantive terminal signal (Q2 2024) | −0.8528σ | FY interpolated |
| Series peak | +2.0708σ (2021-Q3 to 2022-Q2) | Post-pandemic stamp duty surge |
| Series trough | −1.7939σ (2019-Q3 to 2020-Q2) | Property correction + duty concessions |
DL-21310-001/002: The stamp duty numerator is available annually only (ABS GFS rolling 10-year window). Quarterly allocation uses transaction value as a proportional weighting proxy. The 20 EATR tail quarters carry Z = −0.034σ by construction — the genuine analytical signal is in the 40-quarter interpolated core (2014-Q3 to 2024-Q2). Use −0.8528σ (Q2 2024 interpolated) as the substantive terminal reading.
| Parameter | Value | Notes |
|---|
| Primary metric | \(PSPR_t = \dfrac{\text{Other Residential}_t}{\text{Other Residential}_t + \text{Houses}_t}\) | Ratified |
| SFC Typology | Supply Friction | APN-GOV-21300-SFC-001 |
| Houses source | ABS 8731.0 Table 11 — Total Sectors Houses New (A418403T) | Original series |
| Other Residential source | ABS 8731.0 Table 11 — Total Sectors Other Res (A419138J) | Original series |
| Frequency | Monthly → quarterly aggregated | No SFCF required |
| μ | 0.4125 | N=60 |
| σ | 0.0521 | N=60 |
| Series minimum | 0.3163 (Q1 2021) | HomeBuilder house surge |
| Series maximum | 0.5157 (Q3 2016) | Investor apartment cycle peak |
| Terminal \(PSPR_t\) (Q4 2025) | 0.4223 | Near long-run mean |
| Terminal Z-Score (Q4 2025) | +0.1883σ | Certified |
0.3163
Series minimum Q1 2021. HomeBuilder grant drove detached house surge — houses reached 68% of all approvals vs 59% historical average.
0.5157
Series maximum Q3 2016. Investor-driven apartment construction cycle peak — Sydney and Melbourne high-density surge ahead of March 2017 APRA intervention.
+0.188σ
Terminal Q4 2025. Near long-run mean after post-HomeBuilder recovery. Planning system generating historically average density mix.
−1.849σ
Minimum Z-Score Q1 2021. Deepest below-mean reading in series — reflects structural demand distortion from HomeBuilder eligibility parameters.
| Parameter | Value | Notes |
|---|
| Primary metric | \(SHSI_t = \dfrac{\text{Social Housing}_t}{\text{Total Occupied Dwellings}_t} \times 100\) | Ratified |
| SFC Typology | Supply Friction | APN-GOV-21300-SFC-001 |
| Numerator source | AIHW NHADR — Housing Assistance in Australia Table DWELLINGS.1 | Annual, 30 June |
| Denominator source | ABS Census anchors + ABS 8752.0 quarterly completions | Interpolated |
| Frequency | Annual (SFCF carry-forward applied) | APN-GOV-21300-SFCF-001 |
| SFCF activation | Q2 each year (30 June reference date) | Carries to Q1 next year |
| Social housing 2011 | 421,005 dwellings | AIHW NHADR |
| Social housing 2024 | 451,754 dwellings (+7.3%) | AIHW NHADR |
| Total dwellings 2011 | ~8.4 million | ABS 2011 Census |
| Total dwellings 2025 | ~10.6 million (+26%) | Completions accumulated |
| μ | 4.6022% | N=60 |
| σ | 0.2331% | N=60 |
| Series maximum | 5.0194% (Q2 2011) | +1.790σ — series opening |
| Terminal \(SHSI_t\) (Q4 2025) | 4.2618% | SFCF carry-forward from 2024 |
| Terminal Z-Score (Q4 2025) | −1.4599σ | Certified |
Opening
Q1–Q4 2011
+1.48σ to +1.79σ
Series peak. Social housing share at its highest — 5.0%+ of total stock. Public housing dominant at 331,371 dwellings.
Gradual Decline
2012–2017
+1.61σ → +0.34σ
Slow structural erosion as private dwelling completions outpace social housing growth. Public housing begins absolute decline from 2014 onwards.
Accelerating Decline
2018–2022
+0.34σ → −0.85σ
Public housing falls below 300,000. Private dwelling stock growth accelerates post-HomeBuilder. SHSI crosses below mean in 2018.
Terminal
2023–Q4 2025
−0.96σ → −1.46σ
Sustained sub-mean trajectory. HAFF pipeline not yet observable in certified data. 451,754 social dwellings vs ~10.6m total — 4.26% share.
| Parameter | Value | Notes |
|---|
| Primary metric | \(RBCI_t = \dfrac{B_{\text{base}}}{B_{\text{reg},t}}\) | Ratified |
| SFC Typology | Capital Constraint | APN-GOV-21300-SFC-001 |
| Source | APRA sovereign macroprudential instruments | Tier-1 sovereign |
| Baseline buffer (B_base) | +2.0 percentage points (Q1 2011) | Certified |
| Current buffer (B_reg) | +3.0 percentage points (since Q4 2021) | APRA Oct 2021 |
| Epoch I buffer | +2.0 pp → RBCI = 1.0000 | Q1 2011 – Q2 2019 · 34 quarters |
| Epoch II buffer | +2.5 pp → RBCI = 0.8000 | Q3 2019 – Q3 2021 · 9 quarters |
| Epoch III buffer | +3.0 pp → RBCI = 0.6667 | Q4 2021 – Q4 2025 · 17 quarters |
| μ | 0.8756 | N=60 |
| σ | 0.1483 | N=60 |
| Post-terminal event | Feb 2026 APRA DTI cap (20% at DTI ≥6x) | Excluded from baseline |
| Terminal \(RBCI_t\) (Q4 2025) | 0.6667 | +3.0 pp buffer operative |
| Terminal Z-Score (Q4 2025) | −1.4085σ | Certified · 17 consecutive quarters |
Epoch I — Baseline
Q1 2011 – Q2 2019 · 34 quarters
RBCI = 1.0000 · +0.839σ
Buffer at +2.0 pp. Baseline regulatory environment. March 2017 I/O lending cap added but buffer unchanged.
Epoch II — Moderate
Q3 2019 – Q3 2021 · 9 quarters
RBCI = 0.8000 · −0.510σ
APRA July 2019 — removed 7% floor, formalised +2.5 pp minimum buffer. Moderate constraint.
Epoch III — Material
Q4 2021 – Q4 2025 · 17 quarters
RBCI = 0.6667 · −1.409σ
APRA October 2021 — buffer raised to +3.0 pp. Material constraint on borrowing capacity. Now 17 consecutive quarters.
Post-Terminal
Q1 2026 onwards
DTI Cap Active
Feb 2026: APRA activated 20% cap on new lending at DTI ≥6x. Architecture review required for Q1 2026 extension.
| Parameter | Value | Notes |
|---|
| Primary metric | \(ECCP_t = \dfrac{\Delta C_{\text{NCC}}}{C_{\text{base}}} \times 100\%\) | Ratified |
| SFC Typology | Supply Friction | APN-GOV-21300-SFC-001 |
| NCC uplift source | ABCB Decision RIS + ACIL Allen 2022 | Sovereign / institutional |
| Baseline cost source | Rawlinsons (Melbourne metro proxy) | DL-21360-003 |
| BCA 2010 baseline | \(ECCP_t\) = 0.00% (5-star NatHERS) | Q1 2011 – Q1 2016 · 21 qtrs |
| NCC 2016 uplift | \(ECCP_t\) = 1.45% (6-star NatHERS) | Q2 2016 – Q1 2020 · 16 qtrs |
| NCC 2019 uplift | \(ECCP_t\) = 1.59% (steel-frame market weighted) | Q2 2020 – Q1 2024 · 16 qtrs |
| NCC 2022 uplift | \(ECCP_t\) = 3.42% (pop-weighted, NSW/WA LHDS opt-out) | Q2 2024 – Q4 2025 · 7 qtrs |
| NCC 2025 | Residential pause — carry forward NCC 2022 | \(ECCP_t\) = 3.42% |
| μ | 1.2097% | N=60 |
| σ | 1.0659% | N=60 |
| Terminal \(ECCP_t\) (Q4 2025) | 3.42% | NCC 2022 standard |
| Terminal Z-Score (Q4 2025) | +2.0737σ | Dominant series vector |
DL-21360-005 — Government vs Industry Cost Divergence: For the NCC 2022 transition, the ABCB revised sovereign estimate is $6,008/dwelling (used as metric input). Master Builders Australia field estimates range $11,000–$22,500/dwelling. The divergence reflects post-pandemic supply chain conditions vs theoretical least-cost government modelling. The ABCB figure is used per APN sovereign source preference.
| Parameter | Value | Notes |
|---|
| Primary metric | \(LOCI_t = \sum_i (R_i \times w_i)\text{ for operative instruments}\) | Ratified |
| SFC Typology | Yield Friction (new typology) | APN-GOV-21300-SFC-001 amendment pending |
| Coverage | Victoria, New South Wales, Queensland | ~75% national rental market |
| Construction method | Pure SFCF — Arm A instruments only | No external time-series required |
| VIC RTA 2018 (Rt=196) | Weighted Rt: 63.70 (w=0.325) | 2018-01-01 activation |
| NSW RTA 2018 (Rt=49) | Weighted Rt: 20.38 (w=0.416) | 2018-10-26 activation |
| QLD HLA 2021 (Rt=158) | Weighted Rt: 40.92 (w=0.259) | 2021-10-20 activation |
| Senate report (Rt=20) | EXCLUDED — not operative legislation | DL-21370 — retained Arm A only |
| μ | 55.4202 | N=60 |
| σ | 54.5254 | N=60 |
| Baseline (Q1 2011 – Q4 2017) | \(LOCI_t\) = 0.00 · −1.016σ · 28 quarters | No operative instruments |
| Terminal \(LOCI_t\) (Q4 2025) | 125.01 | All 3 instruments operative |
| Terminal Z-Score (Q4 2025) | +1.2762σ | Certified |
Baseline
Q1 2011 – Q4 2017 · 28 quarters
0.00 · −1.016σ
No operative tenancy reform instruments in the Arm A corpus. Baseline regulatory environment for landlord operations.
VIC Activation
Q1 2018 – Q3 2018 · 3 quarters
63.70 · +0.152σ
VIC Residential Tenancies Amendment Act 2018. 130+ systemic changes. No-grounds eviction restricted. Minimum standards enforced.
VIC + NSW
Q4 2018 – Q3 2021 · 12 quarters
84.08 · +0.526σ
NSW Residential Tenancies Amendment Review Act 2018 activates. Two largest rental markets under elevated constraint framework.
Full Three-State
Q4 2021 – Q4 2025 · 17 quarters
125.01 · +1.276σ
QLD Housing Legislation Amendment Act 2021 activates. All three major states under elevated tenancy constraint. No instrument reversals recorded.
21350 × 21360 — Divergent Mechanisms
Credit Exclusion vs Cost Threshold
Node 21350 operates via direct credit constraint — APRA buffers reduce borrowing capacity and produce an immediate ICR contraction. Node 21360 operates via construction cost escalation — NCC compliance raises the entry price floor for new supply, producing a paradoxical ICR escalation as owner-occupiers are priced out of new construction. Two nodes, two opposing market responses.
21330 × 21350 — Rental Demand Compression
Dual Displacement Into Private Rental
Node 21350 displaces creditworthy but capital-constrained buyers into the rental market. Node 21330 confirms that social housing as a share of total stock has declined persistently — alternative rental pathways are contracting. Together they describe a private rental sector absorbing structural demand pressure from both the demand side (21350) and the alternative supply side (21330).
21360 × 21320 — The Viability Gap
Permission vs Execution
Node 21320 measures what the planning system approves. Node 21360 measures what it costs to build what is approved. Even where the planning environment is permissive (+0.188σ), NCC 2022 compliance costs (+2.074σ) may render approved density commercially unviable — the structural tension that drives the APN Residual Land Value Gap™ (24410).
21360 × 21370 — Supply-Side Compound Friction
Delivery Cost + Operational Cost
Both nodes impose costs on the supply side of the residential rental market from different directions. Node 21360 escalates the physical delivery cost of new construction. Node 21370 escalates the ongoing operational compliance cost of managing existing investment assets. Well-capitalised operators absorb both — smaller participants cannot.
21310 — Fiscal Friction Context
Near-Mean — Structural Holding Position
Node 21310 at −0.853σ (Q2 2024 interpolated) indicates stamp duty burden slightly below its 15-year mean. The 2021–2022 peak (+2.071σ) reflected post-pandemic property price appreciation against static duty thresholds. The current sub-mean reading reflects both market normalisation and the 2022–2023 price correction reducing aggregate transaction values.
Series Direction — Compositional Shift
Not Uniformly Tighter or Looser
The Q4 2025 configuration is not a simple "more restrictive" or "less restrictive" reading. Supply-side friction (21360, 21370) is accelerating. Credit-side constraint (21350) has stabilised at an elevated holding level. Social housing provision (21330) is in sustained structural decline. The regulatory environment is shifting in composition, not direction.
24800 · APN Sovereign Policy Composite Index™
Primary Composite Destination
Receives Z-Score inputs from Node 21310 (fiscal friction), Node 21330 (sovereign housing provision share), and Node 21370 (yield friction). Three structurally distinct policy dimensions aggregated within the SPCI™ architecture.
24410 · APN Residual Land Value Gap™
Supply Delivery Viability
Receives Node 21320 (planning system output permissiveness) as the primary planning constraint variable. The \(PSPR_t\) measures the density mix the system approves — the denominator in the viability equation before NCC compliance costs are applied.
24450 · APN Replacement Cost Gap™
Construction Cost Premium
Receives Node 21360 (\(ECCP_t\)) as the primary construction cost escalation vector, and Node 21320 as a contributing planning constraint input. Together they quantify the gap between theoretical approval capacity and physically executable supply.
24230 · APN Credit Rationing Index™
Regulatory Credit Constraint
Receives Node 21350 (\(RBCI_t\)) as the foundational metric — the APRA buffer translated into a continuous borrowing capacity constraint. The primary input for modelling the systematic exclusion of wage-reliant purchasing cohorts.
24210 · APN Regulatory Velocity Multiplier™
Regulatory Change Rate
Receives Node 21350 as a contributing input — specifically the velocity and epoch transition characteristics of buffer changes. The rate at which macroprudential constraint is escalating or stabilising calibrates the RVM™ multiplier.
24500 · APN Climate-Risk Asset Devaluation Index™
Environmental Mandate Trajectory
Receives Node 21360 as a contributing environmental mandate escalation input. The \(ECCP_t\) trajectory informs the long-run climate compliance cost burden embedded in the residential asset base valuation framework.
Terminal Configuration — Q4 2025 · APN Codex 21300 Series
The certified terminal configuration of the APN Codex 21300 Series at Q4 2025 reveals a regulatory environment undergoing a structural compositional shift rather than a uniform directional adjustment. Node 21360 (+2.0737σ) registers the dominant friction vector in the series — the NCC 2022 transition represents the largest single compliance cost increment in the Code's history and has produced a terminal Z-Score in the upper tail of the 15-year baseline distribution. Node 21370 (+1.2762σ) represents the secondary elevated vector, reflecting progressive tenancy constraint accumulation across the three major rental market jurisdictions with no legislative reversals recorded across the observation period. Nodes 21330 (−1.4599σ) and 21350 (−1.4085σ) both sit materially below their long-run means — social housing provision is declining as a structural share of total stock, while credit access constraints remain at their most restrictive since the baseline commencement. Nodes 21320 (+0.1883σ) and 21310 (−0.853σ interpolated) are near their historical means, indicating neither structural tightening nor easing in planning permissiveness or fiscal transfer friction. The combined configuration describes a residential market in which supply-side delivery costs and operational compliance burdens are escalating while credit access and alternative housing pathways remain structurally constrained — conditions that concentrate participation among well-capitalised cohorts and apply compounding friction on new physical supply delivery. Findings are presented on the basis of data and evidence alone.