Русско-англо-русский юридический словарь

All $50.0 million available under the subordinated debt agreement was borrowed in the first six months of 2007. (wikinvest)

Perpetual subordinated debt is debt (bonds) with no maturity date for the return of principal, never needs to be redeemed by the issuer, and thus pay coupon interest continually until bought back (hence, "perpetual"). (Wikipedia)

Subordinated debt is a loan or security that ranks below other loans and securities with regard to claims on a company's assets or earnings. Subordinated debt is also known as a junior security or subordinated loan. In the case of borrower default, creditors who own subordinated debt won't be paid out until after senior debtholders are paid in full. (Investopedia)