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When parameterizing an Economic Capital (EC) framework, organizations must consider how losses and gains on principal and coupons/fees are recognized, if they are to ensure appropriate capitalization. The level of loss allowance and capital organizations hold must be sufficient to cover potential losses.

Mark Wells, Associate Director of Portfolio Research at Moody’s Analytics, outlines how the parameterization of an Economic Capital model differs for accrual and securities portfolios and relates the parameterization approaches with those associated with Basel Advanced-IRB calculations.
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Measuring Required Economic Capital and Parameterizing the Loss Reference Point

When parameterizing an Economic Capital (EC) framework, organizations must consider how losses and gains on principal and coupons/fees are recognized, if they are to ensure appropriate capitalization. The level of loss allowance and capital organizations hold must be sufficient to cover potential losses. This paper outlines how parametrization differs for accrual and securities portfolios. In addition, we relate parametrization approaches with those associated with Basel Advanced-IRB calculations. We conclude that, when measuring an organization's required economic capital buffer, the relevant loss reference point is the accounting value net of loss allowance — losses should be measured in excess of total spread. While seemingly inconsistent with the Basel A-IRB formulation, where losses are measured in excess of expected loss, the difference can be interpreted as loss allowance exactly aligning with expected loss.

March 2016 Pdf Dr. Amnon Levy, Peter Bozsoki, Thomas Tosstorff, Mark Wells