August 28, 2017
Fitch Downgrades Qatar's Long-Term Issuer Default Rating from AA to AA-.

July 5, 2010 Standard & Poor’s Upgrades Qatar’s Long-Term Sovereign Credit Rating from AA- to AA. 

October 4, 2006

Moody's Upgrades Credit Ratings on Bahrain, Kuwait, Oman, Qatar, Saudi Arabia and the UAE.