Diversity in the senior unsecured bank sector received a welcomed boost this week as Suncorp Bank (Suncorp) (A+/A1/A1) issued the first benchmark non-government guaranteed deal from an Australian bank outside the big four since 2008. While the transaction priced competitively with what the issuer could have achieved in the securitisation space, there are doubts that the transaction will spark significant public senior unsecured deal flow from lower-rated and regional banks.