Wealthy PotFZILX vs VXUS: Free at Fidelity, or Portable at Vanguard?
This comparison crosses two lines at once. FZILX is a Fidelity mutual fund charging 0.00%. VXUS is a Vanguard ETF charging 0.05%. So you are choosing between two fund houses, two wrappers, and two fee levels simultaneously, which is why the answer depends more on where you invest than on the funds themselves.
The Short Answer
- Your money is at Fidelity, in an IRA or 401(k)? FZILX. Free is free, and the lock-in costs you nothing inside a retirement account.
- Your money is at Vanguard, or anywhere else, or in a taxable account? VXUS. It is available everywhere, transfers in kind, and 0.05% is a small price for that.
Neither fund is meaningfully better than the other at the job of owning international stocks. This is a platform decision wearing a fund-comparison costume.
FZILX vs VXUS Side by Side
| Feature | FZILX | VXUS |
|---|---|---|
| Full name | Fidelity ZERO International Index Fund | Vanguard Total International Stock ETF |
| Wrapper | Mutual fund | ETF |
| Expense ratio | 0.00% | 0.05% |
| Index | Fidelity Global ex U.S. Index, Fidelity's own | FTSE Global All Cap ex US Index |
| Scope | Foreign developed and emerging markets | Developed and emerging markets outside the U.S. |
| Where you can hold it | Fidelity only | Any brokerage |
| Minimum | $0 | One share |
Three Differences, Not One
1. The fee. Zero against 0.05%. FZILX wins outright on this axis, and international indexing is expensive enough that 0.05% is not nothing.
2. The wrapper. FZILX is a mutual fund: priced once daily, bought in exact dollar amounts, no bid-ask spread. VXUS is an ETF: trades through the day, can sit at a small premium or discount to net asset value, and settles on the normal cycle. For a long-term buy-and-hold investor neither is clearly better, though the mutual fund is marginally tidier for automatic contributions.
3. Portability, which is the one that bites. VXUS can be transferred in kind to any brokerage. FZILX cannot leave Fidelity at all. If you ever move your account, an FZILX position has to be sold, and in a taxable account that realises a capital gain and produces a tax bill.
Both funds cover foreign developed and emerging markets, so the difference is not one of exposure. FZILX does track Fidelity's own index rather than a licensed third-party benchmark, which is part of how the zero fee is funded; the practical effect on a broad ex-U.S. fund is small.
What the Zero Saves You
- On $10,000: $5 a year.
- On $100,000: $50 a year.
- On $500,000: $250 a year.
That is a more meaningful saving than the domestic equivalent, where the gap between Fidelity's ZERO fund and a standard index fund is narrower. International costs more to run, so going free saves more.
Set it against the exit cost, though. One realised capital gain on an appreciated taxable position can wipe out a decade of that saving in a single tax year. The saving is annual and small; the exit cost is one-off and potentially large.
Which Account Are You In?
Fidelity IRA or 401(k): take FZILX. You capture the full saving, and if you ever want out you can sell inside the account with no tax consequence. The lock-in is nearly costless here.
Fidelity taxable brokerage: this is the real decision. FZILX saves you $50 per $100,000 per year, but commits you to Fidelity for as long as you hold it without paying tax. If you are confident you are staying, take the free fund. If you are not, VXUS is available at Fidelity too and keeps your options open.
Vanguard, Schwab or anywhere else: FZILX is not available to you. VXUS, or that platform's equivalent.
Which One Fits You
Pick FZILX if you are a committed Fidelity customer investing in a retirement account. The fee saving is real and the constraint is not.
Pick VXUS if you value portability, invest in a taxable account, hold accounts at more than one brokerage, or simply prefer a fund tracking a widely licensed third-party index.
If you already hold FZILX in a taxable account and now want out, do not rush. Selling triggers the exact cost this article describes. Redirecting new contributions to a portable fund, and letting the old position shrink as a share of the portfolio, is usually the calmer route.
FAQ
Can I buy FZILX outside Fidelity?
No. Fidelity's ZERO funds are proprietary and cannot be held at or transferred to another brokerage.
Can I buy VXUS at Fidelity?
Yes. It is an ETF and trades like any other, so you are not forced to choose FZILX just because your account is at Fidelity.
Do both include emerging markets?
Yes. FZILX's stated objective covers foreign developed and emerging markets, and VXUS is a total international fund covering both.
Is the zero fee worth the lock-in?
In a retirement account, usually yes. In a taxable account it depends on how likely you are to move brokerages, because leaving means selling and paying tax on gains.
Do I still need a U.S. fund?
Yes. Neither holds U.S. stocks; both are the non-U.S. portion of a portfolio.
This article is for general information and is not investment advice. Fund figures were taken from the Fidelity and Vanguard published fund pages on 2026-09-21 and can change; confirm current figures before you invest. Tax outcomes depend on your own circumstances.