New Zealand's Financial Markets Authority has begun publishing an interactive tool tracking the performance of KiwiSaver funds. The 'KiwiSaver Tracker' on the FMA's website will be updated quarterly and uses the data provided by fund providers through their own quarterly updates and the Companies Office's Disclosure Register. It also makes very clear how funds are performing relative to the management fees they charge. The Australian-owned Big Four banks were neither the best nor worst performers, sitting in the middle rankings for performance and with fees that are generally at the lower end.