Political turmoil to South Africa's economic prospects cast a shadow, the three major international credit rating agencies have lowered the rating of South Africa. Moody's announced that South Africa's long-term high-level unsecured debt rating from Baa2 to Baa3, rating outlook negative, which means that the future may also cut the rating. In April this year, the other two major credit rating agencies Standard & Poor's and Fitch has lowered the rating of South Africa. The statement said that the important reason for the downgrade is that South Africa's institutional framework is weak and policy uncertainty has led to a more bleak outlook. The negative outlook reflects the continued risk of economic growth and financial downturn in South Africa under the influence of political risk. In March this year, the South African cabinet shuffle brought political changes, which posed a threat to the real GDP growth in South Africa. South Africa's economic growth has declined and the policies are uncertain, and these increases have increased the risk of a weak US government's balance sheet.