STOCKHOLM (Standard&Poor's) Oct. 10, 2008-- Standard&Poor's Ratings Services said today that it had revised the outlook on its long-term counterparty credit ratings on Sweden-based Skandinaviska Enskilda Banken AB (SEB) to negative from stable. At the same time, the 'A+' long-term and A-1 short-term ratings on the bank were affirmed. "The outlook revision reflects a sharper-than-expected slowdown in the Baltic countries and the negative implications for the bank's asset quality and earnings. It also reflects the sizeable impact on earnings and shareholders' equity of mark-to-market losses in the bank's securities portfolio," said Standard&Poor's credit analyst Miguel Pintado. SEB is exposed to the economic contraction in the Baltic countries. The SEB group has been one of