The S&P/ASX iBoxx Australian Fixed Interest Index measures the performance of investment grade, AUD-denominated bonds issued by government, sovereign, semi-government and corporate issuers in Australia. Bonds must have a minimum amount outstanding of AUD 2 billion for Australian Government Securities, AUD 250 million for Australian State Governments and Territories and AUD 100 million for other issuers. Bonds must have a minimum time to maturity of 18 months at issuance and 12 months at rebalancing. Bonds must be clearable through Austraclear.