When are ratings updated?

Ratings are now updated at least 8 times per year. Additional minor updates may be added when special corrections or adjustments are needed. For 2011, ratings are scheduled to be updated on March 29th, May 17th, June 21st, July 19th, August 30th, September 13th, October 25th, and November 22nd with the 2011 yearend update on January 24th, 2012.