The short answer
NZ retail managed funds have two distinct risks: (1) the value of the underlying investments can fall (market risk — every fund has this), and (2) the fund manager could fail commercially (operational risk — every regulated NZ MIS has multi-party protection against this). The Financial Markets Conduct Act 2013 separates the manager from the custody of your money and adds independent oversight. Market risk you can't engineer away — pick a fund whose risk indicator matches your timeframe. Operational risk is structurally mitigated for every fund on the FMA Disclose register.
The four-party model — and what each party is responsible for
Every NZ retail managed fund has four distinct parties around it. The manager (e.g. Milford, Simplicity, Pie) picks investments and runs the fund — but doesn't touch your money directly. The licensed supervisor (Public Trust, Trustees Executors Limited, or NZ Guardian Trust supervise most NZ MIS) sits independently and is responsible for monitoring the manager's compliance with the SIPO and the trust deed. The custodian (often HSBC Bank Australia, NZ Trustees Custody, Public Trust Custody) physically holds the assets — your money never lives with the manager. The auditor (PwC, KPMG, EY, Deloitte, Grant Thornton in NZ MIS) independently verifies the annual financials. This four-party split is what makes "what happens if Kernel goes bust?" structurally different from "what happens if my bank goes bust?".
What happens if the manager fails
If the manager fails commercially, your money is not part of the manager's bankrupt estate — it sits with the custodian, owned legally by the supervisor on behalf of unit-holders. Under FMC Act §145, the licensed supervisor can replace the manager: either appoint a new manager to continue running the fund, or wind the fund up and return proceeds to unit-holders at the prevailing net asset value. The custodian and supervisor are required to be independent of the manager precisely so this hand-over can happen cleanly. Verify the trustee/auditor identity on each fund's page (sourced from the scheme's Other Material Information document on FMA Disclose).
What the PIE wrapper adds (and doesn't add)
Most NZ retail managed funds are Portfolio Investment Entities (PIEs) — a tax structure that caps your investor tax at your Prescribed Investor Rate (max 28%) and handles tax for you. PIE status is about tax efficiency, not investor protection. The protection comes from the MIS structure under the FMC Act, not the PIE wrapper. Australian-domiciled unit trusts sold into NZ (some Vanguard / India Avenue funds) sit outside PIE — same MIS protections in their home jurisdiction (Australian Investment Schemes Act 1989 or equivalent), but you handle tax via the Foreign Investment Fund regime.
Custodian banks — does it matter who holds the money?
The custodian is the party that physically holds your fund's assets — share certificates, bond certificates, cash balances. Big NZ MIS custodians include HSBC Bank Australia (used by Milford and others), NZ Trustees Custody (used by many smaller schemes), Public Trust Custody (used by funds whose supervisor is also Public Trust), and Anchorage Custody. Custodian identity is disclosed in every scheme's OMI document. Larger global-bank custodians have stronger credit profiles; smaller NZ custodians often have closer integration with their supervisor. Both models work — the structural protection is the same.
What about FMA Disclose — what does the register actually protect?
The FMA Disclose register (disclose-register.companiesoffice.govt.nz) is the authoritative public record of every NZ retail managed-fund scheme. Every fund must lodge: a Product Disclosure Statement (PDS), Statement of Investment Policy and Objectives (SIPO), Other Material Information (OMI), and Quarterly Fund Updates. The FMA reviews these for FMC-Act compliance. Being on Disclose isn't a quality stamp — but it does mean: the manager is licensed, the supervisor is licensed, the four-party governance exists, the data is audited, and the FMA can intervene if the manager breaks the rules. Funds NOT on Disclose aren't retail managed funds — they're wholesale-only vehicles with different (typically weaker for retail investors) protections.
What this guide doesn't cover — market risk
None of the above protects you against your investments going down in value. Market risk — the risk that equities, bonds, or property fall in price — is a feature of investing, not a flaw of NZ's fund regulation. Every NZ retail managed fund must publish a risk indicator (1-7 on the FMA standardised scale) showing historical price volatility. Match that risk indicator to your time horizon: low-risk funds (1-3) for ≤3-year goals, mid (4-5) for 5-10 year horizons, higher-risk (6-7) only when you can wait out a 10+ year drawdown. See `/risk-band/[band]/funds/` for funds grouped by risk indicator.