According to the latest government financial statements, the Accident Compensation Commission (ACC) houses New Zealand's largest fund manager.
The Treasury figures put the ACC portfolio at just over $33 billion as at end of February this year, compared to $29.6 billion for its much more high-profile cousin, the New Zealand Superannuation Fund (NZS).
Unlike the NZS, of course, the ACC fund is receiving regular annual top-ups from the government - well over $2 billion in the last financial year - in addition to an impeccable long-term investment performance that averaged almost 10 per cent annually over the last 20 years.
In its 2013/14 annual report, the ACC fund recorded annual returns of 6.33 per cent, outperforming its benchmarks for the 19th year in a row but only by a slim 0.1 per cent margin.
"... this was the first time in that period that ACC's outperformance did not exceed the costs of managing investments," the 2014 report says.