Moody's Investors Service has this week changed the outlook on its Aa2 rating on all four Australian major banks to negative to reflect challenges in the banks' operating environment. Meanwhile, Australian dollar issuance has been moderate. Suncorp-Metway printed A$350 million (US$267.1 million) in a curve-extending covered bond while South Australian Government Financing Authority issuing A$1 billion in its latest syndicated deal.