FSKAX vs VGSLX: 3% overlap
Fidelity Total Market Index and Vanguard Real Estate Index Admiral share 3.0% 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 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 2.0. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
FSKAX and VGSLX hold 139 of the same securities. The ten contributing most to the overlap figure:
| Holding | in FSKAX | in VGSLX | Δ |
|---|---|---|---|
| CASH | 0.7% | 0.6% | 0.1% |
| WELL | 0.2% | 8.4% | 8.2% |
| PLD | 0.2% | 6.7% | 6.5% |
| EQIX | 0.1% | 5.5% | 5.3% |
| AMT | 0.1% | 4.0% | 3.9% |
| SPG | 0.1% | 3.9% | 3.8% |
| O | 0.1% | 3.0% | 3.0% |
| DLR | 0.1% | 3.3% | 3.2% |
| PSA | 0.1% | 2.7% | 2.6% |
| CBRE | 0.1% | 2.1% | 2.0% |
Where FSKAX and VGSLX 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 | VGSLX | Δ |
|---|---|---|---|
| Real Estate | 2.4% | 84.0% | −81.6pp |
| Information Technology | 29.9% | 0.0% | +29.9pp |
| Financials | 12.2% | 0.3% | +11.9pp |
| Unclassified | 4.0% | 14.7% | −10.7pp |
| Health Care | 9.8% | 0.0% | +9.8pp |
| Communication Services | 9.7% | 0.0% | +9.7pp |
| Industrials | 9.6% | 0.0% | +9.6pp |
| Consumer Discretionary | 9.6% | 0.2% | +9.4pp |
Δ is FSKAX minus VGSLX, 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
97.5% of FSKAX by weight, held in no part of VGSLX.
14.8% of VGSLX 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 | VGSLX | |
|---|---|---|
| Top 10 holdings | 32.1% | 54.1% |
| Positions held | 3,754 | 145 |
| Cost per $10,000 held, per year | $1 | $13 |
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 VGSLX overlap?
FSKAX and VGSLX overlap 3.0% by portfolio weight — largely distinct portfolios. They share 139 holdings. The figure comes from current issuer holdings files (FSKAX as of 2026-02-28, VGSLX as of 2026-06-30).
How is the overlap between FSKAX and VGSLX 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 VGSLX 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 VGSLX?
That depends on your goals — we state facts, not advice. At 3.0% overlap, each fund still contributes meaningfully distinct exposure.
What does FSKAX own that VGSLX doesn't?
FSKAX holds 3,754 positions and VGSLX holds 145; 3,614 of FSKAX's positions don't appear in VGSLX at all, and they are 97.5% of FSKAX by weight.
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Related comparisons
Sources: issuer holdings files, FSKAX as of 2026-02-28, VGSLX as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.