SD-11.5 — Collateral Optimisation & Inventory Management

Business Domain: BD-11 Treasury, Cash & Collateral (Middle office) · Applies: BOTH

Purpose

Manages the firm’s collateral as an inventory and decides, across the whole book, which asset to post where — at the lowest funding cost. Where SD-11.4 runs the per-relationship daily cycle, SD-11.5 takes the firm-wide view: it maintains the collateral inventory, decides the cheapest-to-deliver allocation against each obligation, allocates across triparty agents, and manages the reuse and rehypothecation of collateral. It exists because collateral is a scarce, fungible, fundable resource — posting the wrong asset, or posting a costly asset where a cheaper one would do, is a direct and avoidable funding cost. It is not the daily margin-call cycle — that is SD-11.4, which settles the movements SD-11.5’s allocation decides.

Service Operations

• Maintain the collateral inventory — the firm-wide view of collateral held, posted, received and available, by asset and location.
• Decide cheapest-to-deliver allocation — choose which asset to post against each margin and financing obligation to minimise funding cost, within the eligibility constraints.
• Allocate across triparty agents — direct the collateral across triparty agents and the longbox so it is positioned where it is needed.
• Manage reuse and rehypothecation — track and decide the reuse of received collateral, within the legal and regulatory limits.
• Analyse the sources and uses of collateral — measure the firm’s collateral demand against its supply, and flag scarcity and funding cost.

Inputs and outputs

• Inputs: the margin-and-collateral balances (DR-04) and the eligibility schedules from SD-11.4; the firm’s asset inventory from the book of record (SD-12.1); funding-cost data; triparty-agent positions.
• Outputs: the collateral-allocation decision and the collateral-inventory analysis — consumed by SD-11.4 (which settles the chosen movements), SD-11.8 Securities Finance & Funding (collateral and funding are linked), and treasury governance.

Entities

• Consumes: DR-04 Margin & Collateral Balance, E-04 Holding / Position (book = ibor — the live IBOR asset inventory), DR-03 Master Agreement; the SD-11.4 margin-and-collateral balances (DR-04) and the eligibility schedules; the SD-12.1 firm’s asset inventory from the book of record; PM-14 Direct Loan (from SD-04.12 — directly-originated facilities whose collateral pool sits inside the firm-wide collateral inventory).
• Owns: E-26 Collateral Position — the generic posted / received per-asset collateral record (asset, direction, valuation, haircut, eligibility, counterparty), distinct from the per-relationship DR-04 balance. It is the shared collateral abstraction the derivatives margin balance (DR-04) and the securities loan (PB-10) both reference; the optimisation and inventory analysis run over the E-26 positions and the holdings.

Standards

• The triparty-collateral model — the ECB AMI-SeCo triparty harmonisation work and the triparty agents.
• The collateral-optimisation practice the specialist vendor platforms encode.

Open extensions

• The collateral-substitution sub-model on E-26 — how a posted asset is replaced by another, and the movement chain behind it.
• The optimisation sub-model and its objective function.
• The Service-Operation-level input/output contracts.