In the context of subprime deals, it is a provision that entails the conversion of deal structure from sequential pay to pro-rata pay. The deal cannot be allowed to step down unless a lockout period has lapsed (lockout period provision). During the lockout period the subordinated bonds (as well as the mezzanine and the OC tranches) will not receive principal payments. Thereafter, prinicipal payments can be distributed but only when credit enhancement limits are double their initial levels, and subjet to a set of triggers (performance tests). This would imply the reduction of subordination to its levels before step-down. By the step-down date, the deal collateral will be up for performance test. If the overall collateral performance is within expected ranges (e.g., low levels of cumulative losses), the deal will be allowed to step down.
It is also known as a step-down provision.
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