VTI vs XLK: 33% overlap
Vanguard Total Stock Market ETF and Technology Select Sector SPDR Fund share 33.1% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
You would hold two tickers and get the diversification of 1.7. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
VTI and XLK hold 74 of the same securities. The ten contributing most to the overlap figure:
| Holding | in VTI | in XLK | Δ |
|---|---|---|---|
| NVDA | 6.3% | 14.1% | 7.8% |
| AAPL | 5.8% | 13.2% | 7.3% |
| MSFT | 3.8% | 7.9% | 4.1% |
| AVGO | 2.5% | 5.2% | 2.7% |
| MU | 1.8% | 4.3% | 2.5% |
| AMD | 1.3% | 4.7% | 3.4% |
| AMAT | 0.8% | 3.0% | 2.3% |
| INTC | 0.8% | 3.2% | 2.5% |
| LRCX | 0.7% | 2.7% | 2.0% |
| CSCO | 0.6% | 3.0% | 2.5% |
Where VTI and XLK 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 | VTI | XLK | Δ |
|---|---|---|---|
| Information Technology | 35.2% | 99.9% | −64.7pp |
| Financials | 11.9% | 0.0% | +11.9pp |
| Industrials | 10.4% | 0.0% | +10.4pp |
| Health Care | 9.5% | 0.0% | +9.5pp |
| Consumer Discretionary | 9.2% | 0.0% | +9.2pp |
| Communication Services | 9.1% | 0.0% | +9.1pp |
| Consumer Staples | 4.3% | 0.0% | +4.3pp |
| Energy | 3.1% | 0.0% | +3.1pp |
Δ is VTI minus XLK, 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
66.3% of VTI by weight, held in no part of XLK.
0.5% of XLK by weight, held in no part of VTI.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| VTI | XLK | |
|---|---|---|
| Top 10 holdings | 31.9% | 61.3% |
| Positions held | 3,495 | 76 |
| Cost per $10,000 held, per year | $3 | $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 VTI and XLK overlap?
VTI and XLK overlap 33.1% by portfolio weight — moderate overlap. They share 74 holdings. The figure comes from current issuer holdings files (VTI as of 2026-06-30, XLK as of 2026-07-23).
How is the overlap between VTI and XLK calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If VTI holds a stock at 6% and XLK 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 VTI and XLK?
That depends on your goals — we state facts, not advice. At 33.1% overlap, each fund still contributes meaningfully distinct exposure.
What does VTI own that XLK doesn't?
VTI holds 3,495 positions and XLK holds 76; 3,421 of VTI's positions don't appear in XLK at all, and they are 66.3% of VTI by weight.
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Related comparisons
Sources: issuer holdings files, VTI as of 2026-06-30, XLK as of 2026-07-23. Weights are fractions of each fund. Diagnostics, not advice.