FSKAX vs VFFVX: 51% overlap
Fidelity Total Market Index and Vanguard Target Retirement 2055 share 50.7% 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 4 months apart — FSKAX as of 2026-02-28, 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
FSKAX and VFFVX hold 3,223 of the same securities. The ten contributing most to the overlap figure:
| Holding | in FSKAX | in VFFVX | Δ |
|---|---|---|---|
| NVDA | 6.5% | 3.3% | 3.1% |
| AAPL | 5.9% | 3.1% | 2.8% |
| MSFT | 4.4% | 2.0% | 2.4% |
| AMZN | 3.1% | 1.7% | 1.4% |
| GOOGL | 2.7% | 1.5% | 1.2% |
| AVGO | 2.3% | 1.3% | 1.0% |
| GOOG | 2.2% | 1.2% | 1.0% |
| META | 2.1% | 0.9% | 1.2% |
| TSLA | 1.7% | 0.9% | 0.8% |
| LLY | 1.3% | 0.7% | 0.5% |
Where FSKAX and VFFVX 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 | FSKAX | VFFVX | Δ |
|---|---|---|---|
| Communication Services | 9.7% | 6.0% | +3.7pp |
| Information Technology | 29.9% | 26.3% | +3.6pp |
| Treasuries | 0.0% | 3.3% | −3.3pp |
| Health Care | 9.8% | 7.0% | +2.8pp |
| Unclassified | 4.0% | 6.1% | −2.2pp |
| Consumer Discretionary | 9.6% | 7.6% | +2.0pp |
| Financials | 12.2% | 14.1% | −1.9pp |
| MBS Pass-Through | 0.0% | 1.4% | −1.4pp |
Δ is FSKAX minus VFFVX, 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
3.9% of FSKAX by weight, held in no part of VFFVX.
46.1% of VFFVX by weight, held in no part of FSKAX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| FSKAX | VFFVX | |
|---|---|---|
| Top 10 holdings | 32.1% | 19.2% |
| Positions held | 3,754 | 6 |
| Cost per $10,000 held, per year | $1 | $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 FSKAX and VFFVX overlap?
FSKAX and VFFVX overlap 50.7% by portfolio weight — substantial duplication if you hold both. They share 3,223 holdings. The figure comes from current issuer holdings files (FSKAX as of 2026-02-28, VFFVX as of 2026-03-31).
How is the overlap between FSKAX and VFFVX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If FSKAX holds a stock at 6% and VFFVX 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 FSKAX and VFFVX?
That depends on your goals — we state facts, not advice. At 50.7% overlap, each fund still contributes meaningfully distinct exposure.
What does FSKAX own that VFFVX doesn't?
FSKAX holds 3,754 positions and VFFVX holds 6; 530 of FSKAX's positions don't appear in VFFVX at all, and they are 3.9% of FSKAX by weight.
You probably hold more than two funds
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Related comparisons
Sources: issuer holdings files, FSKAX as of 2026-02-28, VFFVX as of 2026-03-31. Weights are fractions of each fund. Diagnostics, not advice.