VFIFX vs VOO: 46% overlap
Vanguard Target Retirement 2050 and Vanguard S&P 500 ETF share 46.4% 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
VFIFX and VOO hold 503 of the same securities. The ten contributing most to the overlap figure:
| Holding | in VFIFX | in VOO | Δ |
|---|---|---|---|
| NVDA | 3.3% | 7.5% | 4.2% |
| AAPL | 3.1% | 6.6% | 3.5% |
| MSFT | 2.0% | 4.3% | 2.3% |
| AMZN | 1.7% | 3.6% | 2.0% |
| GOOGL | 1.5% | 3.2% | 1.7% |
| AVGO | 1.3% | 2.8% | 1.5% |
| GOOG | 1.2% | 2.6% | 1.4% |
| MU | 0.9% | 2.0% | 1.1% |
| META | 0.9% | 1.9% | 1.0% |
| TSLA | 0.9% | 1.8% | 1.0% |
Where VFIFX and VOO 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 | VFIFX | VOO | Δ |
|---|---|---|---|
| Information Technology | 26.1% | 38.0% | −11.9pp |
| Unclassified | 6.3% | 0.0% | +6.3pp |
| Communication Services | 5.9% | 9.7% | −3.7pp |
| Treasuries | 3.6% | 0.0% | +3.6pp |
| Financials | 14.1% | 11.6% | +2.5pp |
| Health Care | 6.9% | 8.9% | −2.0pp |
| Consumer Discretionary | 7.5% | 9.3% | −1.8pp |
| Cash and/or Derivatives | 1.9% | 0.2% | +1.7pp |
Δ is VFIFX minus VOO, 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
51.5% of VFIFX by weight, held in no part of VOO.
0.1% of VOO by weight, held in no part of VFIFX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| VFIFX | VOO | |
|---|---|---|
| Top 10 holdings | 19.3% | 36.4% |
| Positions held | 6 | 505 |
| Cost per $10,000 held, per year | $8 | $3 |
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 VFIFX and VOO overlap?
VFIFX and VOO overlap 46.4% by portfolio weight — moderate overlap. They share 503 holdings. The figure comes from current issuer holdings files (VFIFX as of 2026-03-31, VOO as of 2026-06-30).
How is the overlap between VFIFX and VOO calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If VFIFX holds a stock at 6% and VOO 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 VFIFX and VOO?
That depends on your goals — we state facts, not advice. At 46.4% overlap, each fund still contributes meaningfully distinct exposure.
What does VFIFX own that VOO doesn't?
VFIFX holds 6 positions and VOO holds 505; 16,179 of VFIFX's positions don't appear in VOO at all, and they are 51.5% of VFIFX by weight.
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Related comparisons
Sources: issuer holdings files, VFIFX as of 2026-03-31, VOO as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.