The iBoxx AUD Overall 0+ Index measures the performance of investment grade, AUD-denominated bonds issued by Australian commonwealth government, semi-government and corporate issuers, including agencies, public banks, regions, supranationals and other semi-governments, as well as corporate issuers. Eligible bonds must have minimum amount outstanding of AUD 2 billion for Australian Government Securities and AUD 250 million for non-government issues. Bonds must have a minimum time to maturity of 18 months at issuance.