Commonwealth Bank of Australia (CommBank) has announced the final margin for its tier one hybrid, Perls VI, at 380 basis points over bank bill swap rate. The offer was upsized to A$1.5 billion (US$1.57 billion) from its original projection of A$750 million. CommBank is the last of the big four banks to offer a retail deal under its own name in 2012, and lodged a prospectus for Perls IV on the Australian Securities Exchange (ASX) on September 3.