OVERVIEW On Feb. 9, 2015, we revised our outlook on Saudi Arabia to negative from stable and affirmed the 'AA-/A-1+' sovereign credit ratings. We view Al Rajhi Bank, The National Commercial Bank (NCB), Riyad Bank, and Samba Financial Group as highly systemically important and Saudi Arabia as highly supportive toward the domestic banking system. A downgrade of Saudi Arabia would lead us to revise our assessment of extraordinary government support for these banks in line with our criteria. Therefore, we are revising our outlooks on Al Rajhi, NCB, Riyad, and Samba to negative from stable and affirming our 'A+/A-1' ratings on these banks. The negative outlooks on the four banks mirror that on the sovereign rating. PARIS (Standard&Poor's)