NEW YORK, Aug. 16 (Xinhua) -- Fitch Ratings Tuesday affirmed its AAA debt rating on the United States, citing the key pillars of the country' s creditworthiness remains intact.

Fitch said in an online statement that the pillars are: the country's "pivotal role in the global financial system"; "the flexible, diversified and wealthy economy that provides its revenue base"; "monetary and exchange rate flexibility further enhances the capacity of the economy to absorb and adjust to 'shocks'."

The rating agency also put the outlook of U.S. debt rating at stable, saying it will review its fiscal projections in light of the outcome of the deliberations of the Joint Select committee, due by end November, as well as its near and medium-term economic outlook for the country by the end of the year.

Fitch' s affirmation came after a similar decision by its peer Moody' s Investors Service, making Standard & Poor's the only one in the three major international rating agencies to downgrade U.S. debt rating.