Unrated data-centre provider NEXTDC launched a new senior-unsecured bond deal on June 2 in wholesale format, in what will be the first such transaction in recent years to be arranged in Australia by a big-four bank – in this case National Australia Bank (NAB). The forthcoming transaction has five-year tenor with an issuer call option starting after two-and-a-half years, and has indicative minimum volume of A$30 million (US$27.9 million).