Standard & Poor's Rating Services affirmed its 'A-' long-term and 'A-2' short term sovereign credit ratings on the Republic of Botswana. Coupled with a stable outlook, the ratings are supported by Botswana's prudent economy policies and a long record of political stability. However, the ratings are constrained by Botswana's narrow economic, which relies heavily on the diamond sector. http://in.reuters.com/article/2012/07/23/idINWLA066320120723