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PAM

Principal At Maturity (PAM) is a standard ACTUS contract type implemented in the Awesome Actus Library.

This class represents fixed-rate or variable-rate instruments such as:

  • Bullet loans
  • Term deposits
  • Zero-coupon or interest-bearing bonds

📚 For full term semantics and rule logic, refer to the ACTUS Standard - PAM.

✅ Usage Examples​

from awesome_actus_lib import PAM

contract = PAM(
    contractID="PAM-001",
    contractRole="RPA",
    contractDealDate="2025-01-01",
    initialExchangeDate="2025-01-02",
    maturityDate="2030-01-01",
    nominalInterestRate=0.03,
    notionalPrincipal=10000.0,
    dayCountConvention="30E360",
    statusDate="2025-01-01",
    currency="USD",
    counterpartyID="CP01",
    creatorID="user01"
)

🧠 Behavior​

The PAM class:

  • Inherits from ContractModel
  • Automatically sets contractType to "PAM"
  • Enforces all ACTUS-specific business rules using conditional groups
  • Supports optional extension via keyword arguments (**other_terms)

🛠️ Conditional Group Handling​

Certain fields become required when a "driver" term is provided. For example:

  • feeRate → requires feeBasis
  • purchaseDate → requires priceAtPurchaseDate
  • cycleAnchorDateOfRateReset → requires rateSpread and marketObjectCodeOfRateReset

These are enforced automatically at instantiation via validate_terms(). If a rule is violated, a useful message is printed out.

🔍 Notes​

  • Accepts both datetime and ISO 8601 str inputs for all ACTUS Terms that refer to dates
  • Supports both ACTUS-defined and user-defined terms
  • Implements ACTUS time consistency checks

🔗 See Also​