Abengoa Yield , the sustainable total return company that owns a diversified portfolio of contracted assets in the energy and environment sectors, announced today that it has been assigned a corporate credit rating of BB+ with a stable outlook by Standard & Poor's Rating Services. Additionally, Abengoa Yield senior unsecured notes due in 2019 were also assigned the same BB+ credit rating and the senior secured credit facility due in 2018 was assigned a BBB rating.