FZROX vs VFIFX: 51% overlap
Fidelity ZERO Total Market Index and Vanguard Target Retirement 2050 share 51.0% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
Different holding dates. These holdings were published about 3 months apart — VFIFX as of 2026-03-31, the rest through 2026-06-30. Each fund is compared using its most recent file, so any trading in between shows up as a difference.
You would hold two tickers and get the diversification of 1.5. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
FZROX and VFIFX hold 2,490 of the same securities. The ten contributing most to the overlap figure:
| Holding | in FZROX | in VFIFX | Δ |
|---|---|---|---|
| NVDA | 6.9% | 3.3% | 3.6% |
| AAPL | 5.7% | 3.1% | 2.6% |
| MSFT | 4.3% | 2.0% | 2.3% |
| AMZN | 3.7% | 1.7% | 2.0% |
| GOOGL | 3.2% | 1.5% | 1.7% |
| AVGO | 2.8% | 1.3% | 1.5% |
| GOOG | 2.6% | 1.2% | 1.4% |
| META | 1.9% | 0.9% | 1.0% |
| TSLA | 1.5% | 0.9% | 0.7% |
| MU | 0.8% | 0.9% | 0.1% |
Where FZROX and VFIFX differ
Sector weights as a share of each fund, ordered by the size of the gap rather than the size of the sector — two funds that overlap heavily still usually diverge somewhere.
| Sector | FZROX | VFIFX | Δ |
|---|---|---|---|
| Information Technology | 32.3% | 26.1% | +6.2pp |
| Communication Services | 10.1% | 5.9% | +4.2pp |
| Treasuries | 0.0% | 3.6% | −3.6pp |
| Unclassified | 3.8% | 6.3% | −2.5pp |
| Financials | 11.8% | 14.1% | −2.2pp |
| Consumer Discretionary | 9.6% | 7.5% | +2.1pp |
| Health Care | 8.6% | 6.9% | +1.7pp |
| MBS Pass-Through | 0.0% | 1.5% | −1.5pp |
Δ is FZROX minus VFIFX, in percentage points. Sector data is not published by every issuer, so “Unclassified” is a real category rather than a gap in the table.
What each fund holds alone
3.7% of FZROX by weight, held in no part of VFIFX.
46.5% of VFIFX by weight, held in no part of FZROX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| FZROX | VFIFX | |
|---|---|---|
| Top 10 holdings | 34.0% | 19.3% |
| Positions held | 2,685 | 6 |
| Cost per $10,000 held, per year | $0 | $8 |
Cost is the expense ratio applied to $10,000; it excludes any brokerage commission, bid-ask spread or tax consequence. Figures are facts about the funds, not a suggestion about which to hold.
Frequently asked
How much do FZROX and VFIFX overlap?
FZROX and VFIFX overlap 51.0% by portfolio weight — substantial duplication if you hold both. They share 2,490 holdings. The figure comes from current issuer holdings files (FZROX as of 2026-04-30, VFIFX as of 2026-03-31).
How is the overlap between FZROX and VFIFX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If FZROX holds a stock at 6% and VFIFX holds the same stock at 4%, 4% counts as shared. The result is bounded between 0% and 100%, and it is computed after looking through any fund-of-funds to the underlying holdings.
Is it redundant to hold both FZROX and VFIFX?
That depends on your goals — we state facts, not advice. At 51.0% overlap, each fund still contributes meaningfully distinct exposure.
What does FZROX own that VFIFX doesn't?
FZROX holds 2,685 positions and VFIFX holds 6; 194 of FZROX's positions don't appear in VFIFX at all, and they are 3.7% of FZROX by weight.
You probably hold more than two funds
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Related comparisons
Sources: issuer holdings files, FZROX as of 2026-04-30, VFIFX as of 2026-03-31. Weights are fractions of each fund. Diagnostics, not advice.