BusinessNZ Our Family The BusinessNZ family has its roots in four large regional organisations of member businesses that together cover the entire country. By joining the regional business organisation in your area, you automatically become a member of BusinessNZ.Join now New Zealand's services sector was in expansion mode for the fourth consecutive month, according to the BNZ - BusinessNZ Performance of Services Index (PSI). The PSI for June was 58.6 (A PSI reading above 50.0 indicates that the service sector is generally expanding; below 50.0 that it is declining). This was 2.3 points up from May, but still below its highest ever result of 61.1 in April.