The company said it expects the most seniorslice of the two-tranche deal to receive a single A rating from DBRS, indicating it is thought to be of "good credit quality".

公司说期待交易中最高等级的部分可以获得道明债券评级（DBRS）的A类评级，这意味着良好的信用质量。

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So, for instance, a risk-averse investor could choose to buy the tranche that exposes him to credit risk only after the first 10% of credit losses have been absorbed by other investors.

ECONOMIST: Credit derivatives

Bankers are keen not to be left holding a toxic tranche of unsellable debt if the credit cycle turns.

ECONOMIST: Corporate debt

As reported, Deutsche Bank is global coordinator, leading a bookrunning group on the dollar tranche of Bank of America, Barclays, Credit Agricole, Mizuho, Morgan Stanley, and Nomura.

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