Module XIII·Article IV·~5 min read
Collateral in Derivatives: ISDA and CSA
Collateral Management
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Collateral Support in Derivatives: ISDA Master Agreement and CSA
The ISDA Master Agreement is a standardized contract of the International Swaps and Derivatives Association, regulating OTC derivative transactions between counterparties. The Credit Support Annex (CSA) is an addendum to the ISDA that defines the mechanism for exchanging collateral to mitigate credit risk.
Structure of ISDA Documentation
| Document | Content | Negotiable? |
|---|---|---|
| ISDA Master Agreement | General terms, events of default, termination | Limited (standard) |
| Schedule | Modifications to Master, elections, representations | Highly negotiable |
| CSA | Collateral terms: thresholds, eligible collateral, haircuts | Highly negotiable |
| Confirmations | Trade-specific terms for each deal | Deal-specific |
Key CSA Terms
| Term | Definition | Typical Values | Significance for CIO |
|---|---|---|---|
| Threshold | Unsecured exposure up to which collateral is not required | $0 - $50M | Lower = less credit risk, higher collateral burden |
| Minimum Transfer Amount (MTA) | Minimum size of collateral transfer | $250K - $1M | Reduces operational burden |
| Independent Amount (IA) | Additional collateral above MTM exposure | 0-10% of notional | Initial margin requirement |
| Rounding | Rounding of transfer amounts | $10K - $100K | Operational convenience |
| Valuation Date | When MTM is performed for margin calls | Daily | Frequency of margin calls |
| Notification Time | Deadline for margin call notification | 10:00-14:00 local | Operational planning |
Credit Support Amount Calculation
The formula for determining required collateral:
$ \text{Credit Support Amount} = \max(0, \text{Exposure} - \text{Threshold}) + \text{Independent Amount} $
$ \text{Delivery Amount} = \max(0, \text{Credit Support Amount} - \text{Collateral Value}) $
$ \text{Return Amount} = \max(0, \text{Collateral Value} - \text{Credit Support Amount} - \text{MTA}) $
Margin Calculation Example
| Parameter | Party A | Party B |
|---|---|---|
| MTM Exposure (A owes B) | $15,000,000 | |
| Threshold | $5,000,000 | $5,000,000 |
| Independent Amount | $2,000,000 | $0 |
| MTA | $500,000 | $500,000 |
Calculation for Party A:
- Exposure over Threshold: $15M - $5M = $10,000,000
- Plus Independent Amount: $10M + $2M = $12,000,000
- Current Collateral Held: $8,000,000
- Delivery Amount: $4,000,000
Eligible Collateral in CSA
| Asset Type | Haircut | Currency Haircut | Valuation |
|---|---|---|---|
| Cash (USD) | 0% | 0% | Face value |
| Cash (EUR, GBP, JPY) | 0% | 0-8% | FX rate |
| US Treasuries (0.5-1Y) | 0% | 0% | MTM |
| US Treasuries (1-5Y) | 1-2% | 0% | MTM |
| US Treasuries (5-10Y) | 2-4% | 0% | MTM |
| US Treasuries (>10Y) | 4-6% | 0% | MTM |
| Agency MBS | 2-5% | 0% | MTM |
| AAA Corporate Bonds | 5-8% | 0-8% | MTM |
| AA Corporate Bonds | 8-12% | 0-8% | MTM |
| Equities (Main Index) | 15-25% | 0-8% | MTM |
| Gold | 10-15% | N/A | LBMA fix |
Variation Margin vs Initial Margin
| Aspect | Variation Margin (VM) | Initial Margin (IM) |
|---|---|---|
| Purpose | Covers current MTM exposure | Covers potential future exposure at close-out |
| Calculation | Daily MTM change | SIMM model or Schedule-based |
| Eligible Collateral | Cash (primarily) | Cash + Securities (with haircuts) |
| Segregation | Usually not required | Required by regulators |
| Rehypothecation | Often allowed | Prohibited for IM |
SIMM (Standard Initial Margin Model)
ISDA SIMM is the standardized model for calculating initial margin:
$ IM = \Sigma \text{Risk Weights} \times \text{Sensitivities} + \text{Correlations Adjustment} $
Risk Classes in SIMM
| Risk Class | Risk Factors | Typical IM Range |
|---|---|---|
| Interest Rate | Delta, Vega, Curvature by tenors | 0.5-3% of notional |
| Credit (Qualifying) | Spread risk by sectors | 1-5% of notional |
| Credit (Non-Qualifying) | Spread risk for non-IG | 3-10% of notional |
| Equity | Delta, Vega by buckets | 5-15% of notional |
| Commodity | Delta, Vega by commodities | 5-20% of notional |
| FX | Delta, Vega by currency pairs | 2-8% of notional |
Events of Default and Close-out
In the event of a default by one party, close-out netting occurs:
- Early Termination Event: Declaration of default
- Designation: Early Termination Date is assigned
- Valuation: All transactions valued at replacement cost
- Netting: Single net amount is determined
- Collateral Application: Held collateral is applied to the net amount
- Close-out Amount: Final settlement (+/- taking into account collateral)
Historical Cases: Lehman ISDA Close-out
- Upon the bankruptcy of Lehman Brothers in 2008:
- About 930,000 derivative contracts were subject to close-out
- The process took years (the last claims settled in 2020+)
- Counterparties with quality CSA received collateral quickly
- Counterparties without CSA or with high thresholds suffered significant losses
- Lesson: Zero threshold CSA significantly reduces counterparty risk
Regulatory Margin Requirements (UMR)
Uncleared Margin Rules require:
| Phase | Threshold | Effective |
|---|---|---|
| Phase 1 | >$3 trillion AANA | 2016 |
| Phase 2 | >$2.25 trillion | 2017 |
| Phase 3 | >$1.5 trillion | 2018 |
| Phase 4 | >$750 billion | 2019 |
| Phase 5 | >$50 billion | 2021 |
| Phase 6 | >$8 billion | 2022 |
CSA Negotiation Strategies for CIO
- Threshold: Negotiate lower thresholds with weaker counterparties, accept higher thresholds with strong counterparties
- Eligible Collateral: Maximal broad list for flexibility
- Haircuts: Negotiate lower haircuts for high-quality collateral
- Timing: Ensure sufficient time for operational response
- Disputes: Clear dispute resolution mechanism
CIO Recommendations
- Standardize where possible: Use standard ISDA terms for efficiency
- Maintain collateral inventory: Keep eligible collateral ready for margin calls
- Monitor exposure daily: Know your aggregate derivative exposure
- Stress test margin requirements: What if rates move 200 bps overnight?
- Diversify counterparties: Do not concentrate derivative exposure with a single dealer
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