High Quality Content by WIKIPEDIA articles! The 2008 World Thoroughbred Rankings was the 2008 edition of the World Thoroughbred Rankings. It was an assessment of Thoroughbred racehorses issued by the International Federation of Horseracing Authorities (IFHA) in January 2009. It included horses aged three or older which competed in flat races anywhere in the world during 2008. It was the first edition to be open to all horses irrespective of where they raced or were trained. In previous years the IFHA had published two separate listings – a "Northern Hemisphere" edition in January, and a "Southern Hemisphere" version in August.