A second agreement developed by the Basel Committee on Banking Supervision in 2004 to promote international standards for measuring and ensuring the adequacy of a bank's capital.
The Basel Committee issued a compilation of Basel II and related guidance 2006.
(Basel II is occasionally written as Basel 2.)
Basel II was updated with effect from the end of 2011, in respect of the capital requirements for market risk and re-securitisations.
These updates are commonly known as 'Basel 2.5'.