The problem was exacerbated if the Crown stopped contributing to the fund completely - as it did for almost a decade between 2009 and 2017.
Whineray has led the $62b sovereign wealth fund since 2018, when he took over from former CEO turned Reserve Bank Governor Adrian Orr.
Since it was founded in 2001 and began investing in 2003, the fund has earned an average annualised return of 9.59 per cent - well above its benchmark measure of Treasury bills.
It owned international and local stocks, and was involved in private equity, venture capital and large-scale infrastructure.
Its bid to fund the Auckland light rail project failed so it was now eyeing an offshore wind farm off the coast of Taranaki alongside a Danish fund - in line with its sustainable finance focus.
In this interview, Whineray discusses how the fund’s growth-focused investment mix may need to change as it edges closer to the Government withdrawal date, and if it prioritises sustainability over returns.
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Madison Reidy is the host of New Zealand’s only financial markets show Markets with Madison. She joined the Herald in 2022 after working in investment, and has covered business and economics for television and radio broadcasters.