This rating is just an opinion of some organization. I have an opinion too: I think the US government has a credit rating of AAA. Why? - The US government can

This rating is just an opinion of some organization. I have an opinion too: I think the US government has a credit rating of AAA. Why? - The US government can produce as much currency as it needs to because it's a sovereign country. Hence, there is not immediate risk of default. - And even if the US government couldn't produce any more dollars, there are plenty of other ways to get hold of the circulating dollars. After all, Congress can pass laws to raise taxes, seize assets, etc.