April 15th, 2006, 11:33 pm
For a Nth to Default basket, the premium is paid on the (original notional - defaulted notional). This is also the practice for most CDOs and credit index trades.However, for credit index tranche trades the most common practice is to pay the premium on (original notional - defaulted notional + recovered notional).The first type of amortization (FTD, CDO, Index) is known as Junior, and the second type (Tranches) is known as None.