It stands for structured interest only; an interest-only bond (tranche) that receives the excess interest (difference between the coupon rate...

An interest-only bond (tranche) that receives the excess interest (difference between the coupon rate on the underlying tranches and the...

An interest-only bond (tranche) that receives the excess interest (difference between the coupon rate on the underlying tranches and the...

An interest-only bond (tranche) that receives the excess interest (difference between the coupon rate on the underlying tranches and the...