Determines the IFRS 9 impairment stage (Stage 1, 2, or 3) for a financial asset based on credit deterioration indicators. Stage 1: 12-month ECL for performing loans with no significant increase in credit risk (SICR). Stage 2: Lifetime ECL for loans with SICR but not credit-impaired (typically 30+ days past due, rating downgrades, or PD increase). Stage 3: Lifetime ECL for credit-impaired assets (typically 90+ days past due or objective evidence of impairment). Use this for loan loss provisioning, financial reporting, and regulatory submissions under IFRS 9.
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Number of days payment is past due (0 = current, 30+ triggers Stage 2, 90+ triggers Stage 3)
x >= 045
Number of notches in credit rating downgrade since origination (2+ typically triggers Stage 2)
x >= 02
Ratio of current PD to origination PD (>2.0 often indicates SICR and triggers Stage 2)
x >= 02.5
Whether there is objective evidence of credit impairment (default, bankruptcy, restructuring) - forces Stage 3
false