An
institution shall regularly perform a credit risk
stress test to assess the effect of certain specific conditions on its total capital requirements for credit risk. The test shall be one chosen by the
institution, subject to supervisory review. The test to be employed shall be meaningful and consider the effects of severe, but plausible, recession scenarios. An
institution shall assess migration in its ratings under the
stress test scenarios. Stressed portfolios shall contain the vast majority of an
institution's total
exposure.