The earnings that move your balance
Nvidia just posted quarterly revenue of US$81.6 billion, an 85% jump year-on-year, with net profit tripling to US$58.3 billion. Data centre revenue alone hit US$75.2 billion. These are staggering numbers for any company, but they matter to New Zealanders for a reason that has nothing to do with gaming GPUs or Silicon Valley hype.
Nvidia now commands roughly 7-8% of the S&P 500. The US market makes up approximately 65% of global equity indices. If your KiwiSaver growth fund holds 60% in global equities tracking the MSCI World or S&P 500, a meaningful slice of your retirement savings is riding on one company’s ability to keep selling AI chips at extraordinary margins. You never picked that stock. The index did it for you.
$123 billion in savings, one dominant theme
The FMA’s 2025 KiwiSaver Annual Report, covering the year to March 2025, put total funds under management at NZ$123.1 billion across 3.4 million members, with an average balance of $36,349. The composition of those funds has shifted dramatically. In 2025, growth funds made up 47.5% of all KiwiSaver assets, up from just 28.3% a decade earlier.
That shift toward growth means a shift toward US tech. The FMA’s own report noted that most KiwiSaver funds invest heavily in US stocks and global indices. With over 40% of the S&P 500’s market capitalisation now tied to the AI growth theme, passive diversification is not what it used to be.
The maths is uncomfortable. Nearly half of New Zealand’s $123 billion KiwiSaver pool sits in growth funds, those growth funds are dominated by US equities, and US equities are increasingly dominated by a handful of AI-adjacent companies with Nvidia at the apex.
Passive funds won by being concentrated
Here is the paradox that KiwiSaver providers would rather not dwell on. Passive funds have delivered superior recent returns precisely because of the concentration that should concern investors. The FMA’s data showed passive providers delivering strong results, while some active managers lagged behind. Members have been rewarded for the very risk they did not knowingly take.
But the same index weighting that amplified gains will amplify losses. If AI capital expenditure slows, if Nvidia’s customers diversify their chip suppliers, or if geopolitical restrictions tighten further, the reversal will hit every passive KiwiSaver growth fund simultaneously. Most members will have no idea why their balance dropped.
Nvidia itself has already excluded China data centre revenue from its outlook following US export restrictions. Its customers, including Microsoft, Meta, and Amazon, all have long-term incentives to reduce dependence on a single GPU supplier. The competitive moat is real, but it is not permanent.
The sovereign fund carries the same exposure
It is not just retail KiwiSaver. The NZ Super Fund reported assets of $86.6 billion as of March 2026, with 12-month returns of 11.9%. The Fund’s passive global equity portfolio tracks MSCI indices, creating structural exposure to the same US tech concentration.
In 2024, Newsroom reported the Fund held 771,114 Nvidia shares worth approximately NZ$991 million as of late 2023, a stake that had grown to roughly NZ$1.75 billion by mid-2024 after a stock split. Current holdings will be significantly larger given subsequent price appreciation. When Nvidia sneezes, both New Zealand’s retirement savings and its sovereign wealth fund feel it.
$870 million in fees for autopilot investing
KiwiSaver members paid NZ$868.5 million in total fees in the year to March 2025, up 10%. For passive fund members, a growing share of that fee buys automated exposure to an index increasingly dominated by a single company. The value proposition of passive investing rests on broad diversification at low cost. When the diversification narrows, the fees remain.
None of this means Nvidia is a bad investment. It might be the best company in the world right now. But there is a difference between choosing to invest in a company and having it chosen for you by index mechanics. The 3.4 million New Zealanders in KiwiSaver deserve to understand that their “diversified” fund has quietly become a concentrated bet on AI infrastructure spending holding up indefinitely.
Providers should be transparent about single-stock concentration in their reporting. The FMA should consider whether current disclosure requirements adequately capture this risk. And every KiwiSaver member with a growth fund should know the name Nvidia, because whether they like it or not, it is already the biggest single company bet in their retirement.
Sources
- AI: Nvidia posts record $136b quarterly revenue on artificial intelligence spending boom
- Why Nvidia’s result matters for KiwiSaver investors
- KiwiSaver Annual Report 2025 (2025-06-30)
- Stock Takes: AI boom leaves New Zealand market behind as Wall Street races to record highs
- NZ Super Fund – Stakeholder Update 7 (2026-04-29)
- AI juggernaut creates a parallel universe (2024-06-24)