Since the US lost its triple A credit rating in August 2011, no country has been safe. Governments rushed to create new debt to finance major stimulus programs aimed at firing up their economies, and credit rating agencies warned investors that bonds issued by the industrialised economies are not as safe as they used to be. Who will be next? Volatility in currency and bond markets is gaining momentum as traders anticipate and react to the next rating action. Check out the guide below on how the biggest economies stack up in terms of credit ratings, debt and size of economy.