Chapter 7: Clearing, Settlement and Risk Management of IRD

7.1 Clearing and Settlement Mechanism: The Central Counterparty

Clearing and settlement of Exchange Traded Interest Rate Derivatives (ETIRD) is executed by SEBI-registered Clearing Corporations (e.g., NSE Clearing Limited - NCL, Indian Clearing Corporation Limited - ICCL, Multi Commodity Exchange Clearing Corporation - MCXCCL).

Legal Mechanism of Novation

Upon execution of a trade on the exchange trading engine, the Clearing Corporation performs Legal Novation:

• The original bilateral contract between the buyer and seller is extinguished.
• It is replaced by two separate, legally distinct contracts:
  1. The Clearing Corporation becomes the Seller to every Buyer.
  2. The Clearing Corporation becomes the Buyer to every Seller.
• This guarantees financial performance and completely eliminates bilateral counterparty credit risk for all market participants.

Original Trade:       BUYER  <=========================>  SELLER
                                    (Trade Executed)
                                           |
                                           v
After Novation:       BUYER  <=====> CLEARING CORP <=====>  SELLER
                             (Seller to Buyer)   (Buyer to Seller)

7.2 Entities in Clearing and Settlement

1. Clearing Corporation (CC): Manages multilateral netting, computes settlement obligations, collects margins, conducts stress testing, and administers the Core SGF.
2. Clearing Members (CMs):
   • SCMs, TCMs, and PCMs maintaining dedicated settlement and clearing accounts.
   • Legally responsible for meeting margin and settlement obligations to the CC.
3. Designated Clearing Banks:
   • RBI-scheduled commercial banks authorized by the CC to operate settlement accounts.
   • Facilitate automated debit (pay-in) and credit (pay-out) of daily cash MTM and final funds settlement.
4. Depositories (NSDL / CDSL) and RBI Public Debt Office (PDO):
   • Maintain electronic dematerialized accounts (Demat) for exchange participants.
   • For physical settlement of sovereign debt, transfers occur through Subsidiary General Ledger (SGL) or Constituent SGL (CSGL) accounts maintained with the RBI Public Debt Office.

7.3 Interoperability Among Clearing Corporations

Under SEBI's interoperability framework:

• Market participants executing trades on NSE, BSE, or other exchanges can elect to clear and settle all trades through a single designated Clearing Corporation of their choice.
• Benefits: Optimizes collateral utilization, consolidates margin requirements across exchanges, enables efficient portfolio risk netting, and reduces operational settlement overheads.

7.4 Clearing Mechanism and Determination of Settlement Obligations

Clearing occurs through Multilateral Netting:

1. At the end of each trading day (5:00 PM), all buy and sell trades executed across all trading members and clients are matched and netted.
2. For each client and proprietary account, the CC calculates:
   • Net open positions in each contract month.
   • Daily Mark-to-Market (MTM) Cash Settlement Obligation.
   • Cumulative gross margin requirements.

7.5 Position Limits Framework

To prevent market concentration, manipulation, and excessive leverage, SEBI and RBI enforce strict multi-tier position limits:

7.6 Settlement Processes: Daily MTM vs Final Settlement

1. Daily Mark-to-Market (MTM) Cash Settlement

• Executed on a daily $T+1$ basis for all open futures contracts.
• Daily Settlement Price (DSP): Calculated as the Volume-Weighted Average Price (VWAP) of all trades executed during the last 30 minutes of trading (4:30 PM to 5:00 PM). If no trades occur in the last 30 minutes, theoretical price is computed based on spot G-Sec yield models.
• Cash Pay-in / Pay-out:
  • MTM Gain: Credited to the member's settlement bank account on $T+1$ morning.
  • MTM Loss: Debited from the member's settlement bank account on $T+1$ morning.
  • Failure to meet MTM pay-in results in immediate terminal disabling and square-off.

2. Final Settlement

On the contract expiry date (last Thursday of the month), open positions are closed via:

• Cash Settlement:
  • Final Settlement Price (FSP) is derived from the official FBIL benchmark G-Sec price (or RBI fixing rate) at 5:00 PM on the expiry day.
  • Final profit/loss is cash-settled directly into bank accounts on $T+1$.
• Physical Delivery Settlement (if designated by contract terms):
  • Involves physical transfer of deliverable sovereign bonds against payment of the Invoice Amount.

7.7 Delivery Settlement under Physical Delivery: Deliverable Basket

For physically delivered 10-year G-Sec futures:

1. Deliverable Basket: The exchange specifies a basket of Government of India securities with residual maturities typically spanning 7.5 to 15 years on the delivery date.
2. Delivery Intent Notice: Short position holders submit an intention to deliver specifying which eligible bond from the basket they will deliver.
3. Conversion Factor (CF) Application: The CC matches short deliverers with long position holders based on automated random allocation.
4. Invoice Amount Computation: $$\text{Invoice Amount} = \left[ (\text{Final Settlement Price} \times \text{CF}) + \text{Accrued Interest} \right] \times \frac{\text{Contract Face Value}}{100}$$

7.8 Risk Management System: SPAN Margining

Clearing Corporations deploy the Standard Portfolio Analysis of Risk (SPAN) system, an internationally recognized portfolio-based margining methodology developed by the Chicago Mercantile Exchange (CME):

                       TOTAL UPFRONT MARGIN REQUIREMENT
                                      |
         +----------------------------+----------------------------+
         |                                                         |
SPAN MARGIN (Worst-Case Risk)                          EXTREME LOSS MARGIN (ELM)
         |                                                         |
Simulates 16 Risk Scenarios:                           Covers Deep Out-of-the-Money
- Price shifts (+/- 3 standard deviations)             Tail Risk (e.g., 1.5% to 2.0%
- Volatility shifts (+/- 10% to 15%)                   of Contract Value)
- Inter-month calendar spread offsets

Components of the Margin Framework:

1. SPAN Margin (Initial Margin):
   • Evaluates total portfolio risk by simulating 16 distinct market risk scenarios combining underlying bond price fluctuations and volatility shifts.
   • Calculates the maximum potential loss over a 1-day holding period at a 99% statistical confidence interval.
2. Extreme Loss Margin (ELM):
   • An additional regulatory safety buffer collected to protect against "black swan" tail-risk events beyond the 99% VaR boundary. Typically fixed at 1.50% to 2.00% of gross notional contract value.
3. Calendar Spread Margin:
   • Concessional margin applied to offsetting long and short positions across different contract expiries (reflecting low basis risk).
4. Client Margin Segregation and Upfront Collection:
   • Under SEBI circulars, Trading/Clearing Members must collect 100% upfront margin from clients prior to order execution.
   • Members are strictly prohibited from utilizing one client's collateral to fund another client's or proprietary margin obligations.
   • Client collateral must be explicitly pledged to the Clearing Corporation via the Demat Debit and Pledge Instruction (DDPI) system.

7.9 Core Settlement Guarantee Fund (Core SGF) and Default Waterfall

Under SEBI regulations aligning with CPMI-IOSCO Principles for Financial Market Infrastructures (PFMI), every Clearing Corporation maintains a ring-fenced Core Settlement Guarantee Fund (Core SGF) to guarantee trade settlement in the event of catastrophic member defaults.

Multi-Tier Default Waterfall Architecture

When a Clearing Member defaults on margin or settlement obligations, losses are absorbed in strict sequential order:

[Tier 1] Defaulter's Own Margin Collateral (SPAN, ELM, Cash, G-Secs)
    |
    v
[Tier 2] Defaulter's Contribution to Core SGF
    |
    v
[Tier 3] Clearing Corporation's Dedicated Resources (Skin-in-the-Game - Minimum 25%)
    |
    v
[Tier 4] Core SGF Remaining Pool (Non-defaulting Members & Exchange Contributions)
    |
    v
[Tier 5] Clearing Corporation Retained Earnings & General Capital Reserves

• Stress Testing: Clearing Corporations conduct daily stress tests simulating extreme historical and hypothetical crisis scenarios (Cover 1 and Cover 2 standards) to ensure Core SGF adequacy at all times.