OpenChainGraph Suite · CONTRACT A3 · arch #5

Cleared Repo Margin & Haircut

W-B. FICC VaR-margin estimate (ART-50) -> CRE22/d349 repo haircuts (508) -> margin-call collateral mobilization (513) -> portfolio VaR distribution (qfa-02).

OpenChainGraph · 4 Steps risk control Hash-Anchored §4 chain_depth:4 Client-Side · Zero PII
Chain Topology — FICC Margin & Netting Estimator → On-Chain Repo Haircut Calculator → Margin Call Collateral Mobilizer → Portfolio Covariance & VaR Engine
§4 Execution Hash · Chain Definition Anchor
execution_hash:computing…
Chain Stages · 4 Steps
1 ROOT · D0 node
FICC Margin & Netting Estimator art-50-ficc-margin-netting-estimator
net_cleared_im + margin_by_bucket feed the haircut calculator
MCP Call · estimate_ficc_margin_netting
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "estimate_ficc_margin_netting",
    "arguments": {}
  },
  "id": 1
}
2 D2 node
On-Chain Repo Haircut Calculator 508-repo-haircut-collateral-calculator
haircut-adjusted collateral value feeds the mobilizer
MCP Call · calculate_repo_haircut
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "calculate_repo_haircut",
    "arguments": {}
  },
  "id": 1
}
3 D3 node
Margin Call Collateral Mobilizer 513-margin-call-collateral-mobilizer
mobilization plan + shortfall feed the VaR engine
MCP Call · mobilize_margin_collateral
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "mobilize_margin_collateral",
    "arguments": {}
  },
  "id": 1
}
4 TERMINAL · D4 node
Portfolio Covariance & VaR Engine qfa-02-portfolio-var-engine
Exports composite repo-margin artifact -- final stage
MCP Call · compute_portfolio_var
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "compute_portfolio_var",
    "arguments": {}
  },
  "id": 1
}
Export Artifacts
Download the §4 chain definition artifact (hash-anchored composite JSON) or the §13.11 W3C Verifiable Credentials view. Both derive from the chain definition — no new hash is minted. Available after hash computation.