SECTION 14 — FIN LANE DEEP DIVE (Z6→Z0)

# ============================================================
# LONDON CITY OS — ALMOST-CODE (CANON) — v0.1
# SECTION 14 — FIN LANE DEEP DIVE (Z6→Z0)
#   Finance = payments + markets + clearing + settlement + liquidity control
#   Goal: prevent variance spikes from becoming margin/liquidity/settlement cascades.
# ============================================================
CANON_VERSION: "v0.1"
PLACE:
  place_id: "GBR-LON"
  place_name: "London"
  lane: "FIN"
  z_scope: "Z6_to_Z0"
  pack: "FIN_DEEP_DIVE"
  depends_on_sections:
    - "SECTION_07_SENSORS_PACK"
    - "SECTION_08_ROUTER_CORE"
    - "SECTION_12_GOV_GRAPH"
    - "SECTION_13_LANE_DIRECTORY_INDEX"
# ------------------------------------------------------------
# 14A) Definition locks (finance-specific)
# ------------------------------------------------------------
DEFINITION_LOCK:
  RTGS_CORRIDOR:
    >
    Real-time gross settlement corridor for high-integrity final settlement
    in central bank money. (The "ground truth" settlement corridor.)
  HIGH_VALUE_PAYMENTS:
    >
    Time-critical wholesale payments where settlement finality matters more than cost.
  RETAIL_PAYMENTS:
    >
    High-volume consumer/business payments where continuity + uptime is the stability target.
  CLEARING:
    >
    The risk-netting organ: replaces bilateral exposures with a central risk manager
    (reduces network cascade probability, but concentrates risk into the clearing node).
  SETTLEMENT:
    >
    The finality organ: delivery-versus-payment (DvP) transfer of securities and cash.
  LIQUIDITY_BUFFER:
    >
    A controlled buffer of cash/collateral that prevents forced selling cascades.
  MARGIN_CASCADE:
    >
    Volatility ↑ -> margin calls ↑ -> forced selling -> volatility ↑ (positive feedback loop).
  SETTLEMENT_FAIL_CASCADE:
    >
    Operational/market stress -> delivery fails -> liquidity locks -> backlog age rises ->
    credit tightens -> market function degrades.
  FIN_P0:
    >
    Below-threshold market function: settlement fails cluster, liquidity freeze, or
    disorderly markets requiring hard truncation + staged stitch.
# ------------------------------------------------------------
# 14B) Z6 org anchors (minimal viable London finance stack)
#   (Use stable tokens; expand later; never rename.)
# ------------------------------------------------------------
ORG_REGISTRY_Z6:
  GBR-LON::FIN::Z6::ORG.BOE:
    org_kind: "CENTRAL_BANK"
    scope: ["RTGS","HIGH_VALUE_PAYMENTS","SYSTEM_STABILITY"]
    notes: "Operates RTGS and CHAPS operations under integrated governance."
  GBR-UK::FIN::Z6::ORG.FCA:
    org_kind: "CONDUCT_REGULATOR"
    scope: ["MARKET_INTEGRITY","CONSUMER_PROTECTION","FIRM_CONDUCT"]
  GBR-UK::FIN::Z6::ORG.PRA:
    org_kind: "PRUDENTIAL_REGULATOR"
    scope: ["BANKS","INSURERS","SYSTEMIC_FIRMS"]
  GBR-UK::FIN::Z6::ORG.PAYUK:
    org_kind: "RETAIL_PAYMENTS_OPERATOR"
    scope: ["FPS","BACS","ICS"]
  GBR-LON::FIN::Z6::ORG.LSEG:
    org_kind: "FINANCIAL_MARKET_INFRA_GROUP"
    scope: ["VENUES","POST_TRADE","DATA"]
  GBR-LON::FIN::Z6::ORG.LCH:
    org_kind: "CLEARING_HOUSE"
    scope: ["RATES_CLEARING","MULTI_ASSET_CLEARING","RISK_MGMT"]
  GBR-LON::FIN::Z6::ORG.LSE:
    org_kind: "TRADING_VENUE"
    scope: ["EQUITIES_LISTING","SECONDARY_MARKETS"]
  GBR-LON::FIN::Z6::ORG.EUROCLEAR_UKI:
    org_kind: "CSD_SETTLEMENT_OPERATOR"
    scope: ["CREST_SETTLEMENT","ISSUANCE_DEPOSIT_HOLDING"]
# ------------------------------------------------------------
# 14C) Z5 command nodes (who pushes the buttons)
# ------------------------------------------------------------
CONTROL_NODES_Z5:
  GBR-LON::FIN::Z5::CTRL.BOE_RTGS_OPS:
    owner_org: "GBR-LON::FIN::Z6::ORG.BOE"
    node_kind: "RTGS_OPERATIONS_AND_RISK"
    can_execute:
      - "ACT.FIN.LIQUIDITY_SUPPORT_GATE (policy-dependent)"
      - "ACT.FIN.RTGS_ACCESS_CONTROL"
      - "ACT.FIN.RTGS_DEGRADED_MODE"
      - "ACT.FIN.PUBLISH_SYSTEM_STATUS"
  GBR-UK::FIN::Z5::CTRL.PAYUK_OPS:
    owner_org: "GBR-UK::FIN::Z6::ORG.PAYUK"
    node_kind: "RETAIL_PAYMENTS_OPERATIONS"
    can_execute:
      - "ACT.FIN.RETAIL_DEGRADED_MODE"
      - "ACT.FIN.RATE_LIMITS_RETAIL"
      - "ACT.FIN.PUBLISH_RETAIL_STATUS"
  GBR-LON::FIN::Z5::CTRL.LCH_RISK:
    owner_org: "GBR-LON::FIN::Z6::ORG.LCH"
    node_kind: "CLEARING_RISK_CONTROL"
    can_execute:
      - "ACT.FIN.MARGIN_VALVE_ADJUST (ruleset)"
      - "ACT.FIN.DEFAULT_WATERFALL_TRIGGER"
      - "ACT.FIN.CLEARING_MEMBER_CONTROLS"
      - "ACT.FIN.PUBLISH_CLEARING_STATUS"
  GBR-LON::FIN::Z5::CTRL.LSE_MARKET_OPS:
    owner_org: "GBR-LON::FIN::Z6::ORG.LSE"
    node_kind: "VENUE_MARKET_OPERATIONS"
    can_execute:
      - "ACT.FIN.MARKET_HALT_VALVE"
      - "ACT.FIN.TICK_SIZE_OR_BAND_ADJUST (ruleset)"
      - "ACT.FIN.PUBLISH_MARKET_STATUS"
  GBR-LON::FIN::Z5::CTRL.CREST_SETTLEMENT_OPS:
    owner_org: "GBR-LON::FIN::Z6::ORG.EUROCLEAR_UKI"
    node_kind: "SETTLEMENT_OPERATIONS"
    can_execute:
      - "ACT.FIN.SETTLEMENT_DEGRADED_MODE"
      - "ACT.FIN.CUTOFF_TIME_VALVE (ruleset)"
      - "ACT.FIN.PUBLISH_SETTLEMENT_STATUS"
  GBR-UK::FIN::Z5::CTRL.FCA_MARKET_OVERSIGHT:
    owner_org: "GBR-UK::FIN::Z6::ORG.FCA"
    node_kind: "REGULATORY_OVERSIGHT"
    can_execute:
      - "ACT.FIN.MARKET_INTEGRITY_ESCALATION"
      - "ACT.FIN.PUBLIC_WARNING (integrity)"
      - "ACT.FIN.COORD_JOIN_PUBLIC_MESSAGE"
  GBR-UK::FIN::Z5::CTRL.PRA_SUPERVISION:
    owner_org: "GBR-UK::FIN::Z6::ORG.PRA"
    node_kind: "PRUDENTIAL_SUPERVISION"
    can_execute:
      - "ACT.FIN.FIRM_STABILITY_ESCALATION"
      - "ACT.FIN.RESOLUTION_ROUTING (if invoked)"
# ------------------------------------------------------------
# 14D) Z4 corridors (the money pipes)
# ------------------------------------------------------------
CORRIDORS_Z4:
  GBR-LON::FIN::Z4::CORR.PAYMENTS.RTGS:
    payload: "CENTRAL_BANK_MONEY_FINALITY"
    anchors: ["CTRL.BOE_RTGS_OPS"]
    couples_to: ["DATA::TRUST_PUBLISHING","GOV::DECISION_PIPELINE"]
  GBR-LON::FIN::Z4::CORR.PAYMENTS.CHAPS:
    payload: "HIGH_VALUE_STERLING_PAYMENTS"
    anchors: ["CTRL.BOE_RTGS_OPS"]
    notes: "Uses RTGS for settlement finality."
  GBR-UK::FIN::Z4::CORR.PAYMENTS.FPS:
    payload: "REAL_TIME_RETAIL_PAYMENTS"
    anchors: ["CTRL.PAYUK_OPS"]
  GBR-UK::FIN::Z4::CORR.PAYMENTS.BACS:
    payload: "BATCH_RETAIL_PAYMENTS"
    anchors: ["CTRL.PAYUK_OPS"]
  GBR-UK::FIN::Z4::CORR.PAYMENTS.ICS:
    payload: "CHEQUE_IMAGE_CLEARING"
    anchors: ["CTRL.PAYUK_OPS"]
  GBR-LON::FIN::Z4::CORR.CLEARING.CCP:
    payload: "RISK_NETTING_AND_MARGIN"
    anchors: ["CTRL.LCH_RISK"]
  GBR-LON::FIN::Z4::CORR.SETTLEMENT.CREST:
    payload: "DVp_SECURITIES_SETTLEMENT"
    anchors: ["CTRL.CREST_SETTLEMENT_OPS"]
  GBR-LON::FIN::Z4::CORR.MARKETS.EQUITIES:
    payload: "ORDER_FLOW_AND_PRICE_DISCOVERY"
    anchors: ["CTRL.LSE_MARKET_OPS"]
    couples_to: ["CLEARING.CCP","SETTLEMENT.CREST"]
# ------------------------------------------------------------
# 14E) Z3 portals + valves (interfaces and choke controls)
# ------------------------------------------------------------
PORTALS_Z3:
  GBR-LON::FIN::Z3::PORTAL.RTGS_ACCESS:
    corridor: "CORR.PAYMENTS.RTGS"
    portal_kind: "MEMBERSHIP_AND_ACCESS_GATE"
  GBR-LON::FIN::Z3::PORTAL.CHAPS_PARTICIPATION:
    corridor: "CORR.PAYMENTS.CHAPS"
    portal_kind: "HIGH_VALUE_PAYMENT_GATE"
  GBR-LON::FIN::Z3::PORTAL.FPS_GATEWAY:
    corridor: "CORR.PAYMENTS.FPS"
    portal_kind: "RETAIL_REALTIME_GATE"
  GBR-LON::FIN::Z3::PORTAL.BACS_SUBMISSION:
    corridor: "CORR.PAYMENTS.BACS"
    portal_kind: "RETAIL_BATCH_GATE"
  GBR-LON::FIN::Z3::PORTAL.CLEARING_GATE_LCH:
    corridor: "CORR.CLEARING.CCP"
    portal_kind: "CCP_CLEARING_GATE"
  GBR-LON::FIN::Z3::PORTAL.MARKET_GATE_LSE:
    corridor: "CORR.MARKETS.EQUITIES"
    portal_kind: "VENUE_TRADING_GATE"
  GBR-LON::FIN::Z3::PORTAL.CREST_SETTLEMENT_GATE:
    corridor: "CORR.SETTLEMENT.CREST"
    portal_kind: "CSD_SETTLEMENT_GATE"
VALVES_Z3:
  GBR-LON::FIN::Z3::VALVE.LIQUIDITY_SUPPORT_GATE:
    owner_ctrl: "CTRL.BOE_RTGS_OPS"
    valve_kind: "CENTRAL_LIQUIDITY_BUFFER"
    purpose: "stop liquidity freeze from becoming forced selling cascade"
  GBR-LON::FIN::Z3::VALVE.MARGIN_VALVE:
    owner_ctrl: "CTRL.LCH_RISK"
    valve_kind: "COLLATERAL_AND_MARGIN_CONTROL"
    purpose: "contain CCP risk without triggering self-amplifying margin cascades"
  GBR-LON::FIN::Z3::VALVE.MARKET_HALT:
    owner_ctrl: "CTRL.LSE_MARKET_OPS"
    valve_kind: "VOLATILITY_CIRCUIT_BREAKER"
    purpose: "truncate disorderly price formation"
  GBR-LON::FIN::Z3::VALVE.SETTLEMENT_CUTOFFS:
    owner_ctrl: "CTRL.CREST_SETTLEMENT_OPS"
    valve_kind: "TIME_AND_PROCESSING_GATE"
    purpose: "prevent fail cascades via controlled sequencing"
  GBR-UK::FIN::Z3::VALVE.RETAIL_RATE_LIMITS:
    owner_ctrl: "CTRL.PAYUK_OPS"
    valve_kind: "THROUGHPUT_SHAPING"
    purpose: "preserve uptime during surge/incident (degraded modes)"
# ------------------------------------------------------------
# 14F) Z2 subnets (district-scale finance control regions)
# ------------------------------------------------------------
SUBNETS_Z2:
  GBR-LON::FIN::Z2::SUBNET.WHOLESALE_CORE:
    includes:
      - "CORR.PAYMENTS.RTGS"
      - "CORR.PAYMENTS.CHAPS"
      - "CORR.CLEARING.CCP"
      - "CORR.SETTLEMENT.CREST"
      - "CORR.MARKETS.EQUITIES"
  GBR-LON::FIN::Z2::SUBNET.RETAIL_PAYMENTS:
    includes:
      - "CORR.PAYMENTS.FPS"
      - "CORR.PAYMENTS.BACS"
      - "CORR.PAYMENTS.ICS"
  GBR-LON::FIN::Z2::SUBNET.POST_TRADE_CORE:
    includes:
      - "CORR.CLEARING.CCP"
      - "CORR.SETTLEMENT.CREST"
# ------------------------------------------------------------
# 14G) Z1 cells (where overload becomes visible)
# ------------------------------------------------------------
CELLS_Z1:
  GBR-LON::FIN::Z1::CELL.MARGIN_CALL_QUEUE:
    surface_kind: "QUEUE_FIELD"
    parent_subnet: "SUBNET.WHOLESALE_CORE"
  GBR-LON::FIN::Z1::CELL.SETTLEMENT_FAILS_QUEUE:
    surface_kind: "QUEUE_FIELD"
    parent_subnet: "SUBNET.POST_TRADE_CORE"
  GBR-LON::FIN::Z1::CELL.RTGS_BACKLOG:
    surface_kind: "INTERFACE_BUFFER"
    parent_subnet: "SUBNET.WHOLESALE_CORE"
  GBR-LON::FIN::Z1::CELL.RETAIL_SURGE_BUFFER:
    surface_kind: "INTERFACE_BUFFER"
    parent_subnet: "SUBNET.RETAIL_PAYMENTS"
  GBR-LON::FIN::Z1::CELL.MARKET_VOLATILITY_FRONTIER:
    surface_kind: "LAST_MILE_CONFLICT_ZONE"
    parent_subnet: "SUBNET.WHOLESALE_CORE"
# ------------------------------------------------------------
# 14H) Sensors (finance specialisations of shared pack)
# ------------------------------------------------------------
SENSORS_FIN:
  S.fin.rtgs_throughput:
    maps_to: "S.throughput_rate"
  S.fin.chaps_value_proxy:
    maps_to: "S.throughput_rate"
  S.fin.retail_uptime:
    maps_to: "S.capacity_delta"
  S.fin.settlement_fail_rate:
    maps_to: "S.queue_index"
  S.fin.settlement_backlog_age:
    maps_to: "S.backlog_age"
  S.fin.margin_call_volume:
    maps_to: "S.queue_index"
  S.fin.collateral_shortfall_index:
    maps_to: "S.capacity_delta"
  S.fin.volatility_proxy:
    maps_to: "S.variance_index"
  S.fin.bid_ask_spread_proxy:
    maps_to: "S.variance_index"
  S.fin.substitution_pressure_cash_hoarding:
    maps_to: "S.substitution_pressure"
  S.fin.incident_state:
    maps_to: "S.incident_state"
  S.fin.rebound_risk_after_halt_or_restore:
    maps_to: "S.rebound_risk"
# ------------------------------------------------------------
# 14I) Tripwires (P1/P0) + truncation/stitch rules
# ------------------------------------------------------------
TRIPWIRES:
  FIN_P1_EARLY_WARNING:
    if:
      - "S.fin.volatility_proxy rises 2 bands within 2 windows"
      - "OR S.fin.margin_call_volume rising + collateral_shortfall_index worsening"
      - "OR settlement_fail_rate rising + backlog_age rising"
    then:
      - "activate PLAYBOOK.FIN.MARGIN_CASCADE_TRUNCATION (pre-truncation)"
      - "activate PLAYBOOK.FIN.SETTLEMENT_FAIL_ISOLATION"
  FIN_P1_TRIGGER:
    if:
      - "S.fin.settlement_backlog_age > threshold_age"
      - "OR spreads widen beyond band"
      - "OR RTGS backlog persists beyond window"
    then:
      - "TRUNCATE: tighten MARKET_HALT valve readiness + clearing member controls"
      - "publish unified status via DATA/GOV comms spine (Section 12)"
  FIN_P0_TRIGGER:
    if:
      - "clustered settlement fails + liquidity freeze indicators"
      - "OR CCP stress event + default waterfall steps"
      - "OR incident_state in [MAJOR,OUTAGE]"
    then:
      - "HARD TRUNCATION: orderly market halts where needed"
      - "liquidity support gate (policy path) + staged restore plan"
      - "stitch only after 2-window P2 stability across: RTGS, clearing, settlement"
# ------------------------------------------------------------
# 14J) Playbooks (executable sequences)
# ------------------------------------------------------------
PLAYBOOK_LIBRARY:
  PLAYBOOK.FIN.MARGIN_CASCADE_TRUNCATION:
    intent: "Stop volatility→margin→forced selling positive feedback loop."
    actions:
      - {act: ACT.FIN.CLEARING_MEMBER_CONTROLS, owner: "CTRL.LCH_RISK", when: "P1 early"}
      - {act: ACT.FIN.MARKET_HALT_VALVE, owner: "CTRL.LSE_MARKET_OPS", when: "disorderly frontier"}
      - {act: ACT.FIN.PUBLISH_CLEARING_STATUS, owner: "CTRL.LCH_RISK"}
      - {act: ACT.FIN.PUBLISH_MARKET_STATUS, owner: "CTRL.LSE_MARKET_OPS"}
    stitch:
      - "Re-open in stages; monitor rebound_risk; avoid reopening into unresolved collateral shortfall."
  PLAYBOOK.FIN.SETTLEMENT_FAIL_ISOLATION:
    intent: "Prevent settlement fails from becoming system-wide liquidity lock."
    actions:
      - {act: ACT.FIN.SETTLEMENT_DEGRADED_MODE, owner: "CTRL.CREST_SETTLEMENT_OPS"}
      - {act: ACT.FIN.CUTOFF_TIME_VALVE, owner: "CTRL.CREST_SETTLEMENT_OPS", note: "controlled sequencing"}
      - {act: ACT.FIN.PUBLISH_SETTLEMENT_STATUS, owner: "CTRL.CREST_SETTLEMENT_OPS"}
    stitch:
      - "Clear backlog by priority queues; release cutoffs gradually; watch rebound."
  PLAYBOOK.FIN.RETAIL_CONTINUITY:
    intent: "Keep household/business payments flowing during incidents."
    actions:
      - {act: ACT.FIN.RETAIL_DEGRADED_MODE, owner: "CTRL.PAYUK_OPS"}
      - {act: ACT.FIN.RATE_LIMITS_RETAIL, owner: "CTRL.PAYUK_OPS"}
      - {act: ACT.FIN.PUBLISH_RETAIL_STATUS, owner: "CTRL.PAYUK_OPS"}
    stitch:
      - "Remove rate limits in pulses; verify no surge rebound."
  PLAYBOOK.FIN.UNIFIED_PUBLIC_STATUS:
    intent: "Prevent conflicting messages that amplify runs and substitution pressure."
    actions:
      - {act: ACT.FIN.COORD_JOIN_PUBLIC_MESSAGE, owner: "CTRL.FCA_MARKET_OVERSIGHT"}
      - {act: ACT.FIN.PUBLISH_SYSTEM_STATUS, owner: "CTRL.BOE_RTGS_OPS"}
    stitch:
      - "Return to normal message cadence only after P3 stability windows."
# ------------------------------------------------------------
# 14K) Failure mode traces (canonical, non-emotive)
# ------------------------------------------------------------
FAILURE_MODE_TRACE:
  TRACE_VOLATILITY_TO_MARGIN_CASCADE:
    chain:
      - "volatility spike ->"
      - "margin calls ->"
      - "forced selling ->"
      - "spreads widen ->"
      - "liquidity freeze risk"
    repair:
      - "member controls + orderly halts"
      - "liquidity buffers (where applicable)"
      - "staged reopen with rebound monitoring"
  TRACE_SETTLEMENT_FAIL_CASCADE:
    chain:
      - "operational stress ->"
      - "delivery fails ->"
      - "cash/securities lock ->"
      - "backlog age rises ->"
      - "credit tightens"
    repair:
      - "degraded mode + sequencing valves"
      - "priority clearance"
      - "stitch via pulses"
  TRACE_CONFLICTING_STATUS_TO_RUN_DYNAMICS:
    chain:
      - "conflicting messages ->"
      - "substitution pressure (cash hoarding) ->"
      - "retail rails surge ->"
      - "variance spikes ->"
      - "system stress escalates"
    repair:
      - "single comms spine (Section 12)"
      - "retail shaping + clear status publishing"
# ------------------------------------------------------------
# 14L) Cross-lane couplings (London-specific pressure routing)
# ------------------------------------------------------------
CROSS_LANE_COUPLINGS:
  FIN__DATA:
    strength: HIGH
    note: "trust + publishing coherence prevents run dynamics amplification"
  FIN__GOV:
    strength: HIGH
    note: "policy/decision latency can cause governance delay collapse during P1/P0"
  FIN__TRAN:
    strength: MED
    note: "city-core access affects workforce throughput; disruptions can coincide with market stress"
  FIN__SAFE:
    strength: MED
    note: "major incidents drive substitution pressure and messaging risk"
# ------------------------------------------------------------
# 14M) Expansion rules (toward 'full London' enumeration)
# ------------------------------------------------------------
EXPANSION_RULES:
  R1_ENUMERATE_PAYMENT_PORTALS:
    do:
      - "List major participant portal classes (banks, PSPs) as PORTAL.* records."
      - "Bind each to RTGS/CHAPS or retail corridors + access valves."
  R2_ENUMERATE_MARKET_VENUES:
    do:
      - "Add venue tokens (equities, derivatives, FX venues) as PORTAL.*"
      - "Attach MARKET_HALT valve variants per venue ruleset."
  R3_POST_TRADE_GRAPH:
    do:
      - "Add clearing services and settlement asset-class lanes as corridor subsets."
      - "Tile settlement fail cells per asset class."
  R4_EXECUTABILITY_AUDIT:
    do:
      - "For every ACT in FIN playbooks: ensure executor+approver/preauth+publisher per Section 12."
  R5_STRESS_TEST_SCHEMATICS:
    do:
      - "Add scenario packs: cyber outage, venue halt day, CCP stress, retail surge, power loss."
      - "Each scenario must include: tripwire -> truncation -> stitch -> rebound lock."