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                                30 RISK MANAGEMENT (Continued)
A financial asset is no longer considered impaired when all past due amounts have been recovered, and it is determined that the outstanding amounts with future expected income are fully collectable in accordance with the original contractual terms or revised terms of the financial instrument with all criteria for the impaired classification having been remedied. The financial asset will be transferred back to stage 2 after a cure period.
The Corporation regularly monitors the effectiveness of the criteria used to identify whether there has been a significant increase in credit risk and revises them as appropriate to ensure that the criteria are capable of identifying significant increase in credit risk before the amount becomes past due.
ii) Measurement of Expected Credit Losses (ECLs)
ECL represents the average credit losses weighted by the probabilities of default (PD), whereby credit losses are defined as the present value of all cash shortfalls. The ECL is calculated for both Stage 1 and Stage 2 instruments by multiplying three main components, being the probability of default (PD), loss given default (LGD) and the exposure at default (EAD), and discounting the resulting provision using the instrument’s effective profit rate (EPR).
These ECL parameters are generally derived from internally developed models and other historical data. They are adjusted to reflect forward-looking information as described below.
PD represents the likelihood of a counterpart defaulting on its financial obligation over different time horizon (e.g., 1 year or lifetime). The estimates the PDs using internal rating tools tailored to the various categories of counterparties and exposures. These internal rating models are based on internally and externally compiled data comprising both quantitative and qualitative factors. They produce a relative credit risk grading, which is in turn are associated with
a likelihood of default (PD) over a one-year horizon, that is calibrated to reflect the Corporation’s long run average default rate estimates (through-the-cycle (TTC) PD). The Corporation uses a specific model based on country and industry parametrization to convert its TTC PDs into point-in time (PIT) PDs and derives a PIT PD term structure.
LGD is the magnitude of the potential loss in the event of a default. This is generally estimated as value lost plus costs net of recovery (if any) as percentage of outstanding amount. The Corporation uses internal LGD estimation models that consider the structure, collateral, and seniority of the claim and the counterparty rating and jurisdiction. LGD estimates are calibrated to reflect the recovery experience of the Corporation as well as the Multilateral Development Banks’ consortium data.
EAD represents the expected exposure in the event of a default. The Corporation derives the EAD from the current exposure to the counterparty and potential changes to the current amount allowed under the contract including amortization. The EAD of a financial instrument is its gross carrying amount. For contract under disbursement and financial commitments such as guarantees, letter of credit, the EAD includes the amount drawn, as well as potential future amounts that may be drawn under the contract.
FAS 30 requires ECLs to be forward-looking.The Corporation uses a statistical model that links its counterparties’ future performance to the current and future state of the macroeconomic environment. The model links macroeconomic scenarios to counterparty’s default risk. Macroeconomic factors taken into consideration include, but are not limited to, gross domestic product, equity market prices, unemployment rates, and commodity prices and these require an evaluation of both the current and forecast direction of the macro-economic cycle. The Corporation estimates its ECLs by calculating the weighted average ECL of its exposures across three (3) set
of forward-looking macroeconomic scenarios.
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