XLK vs XLRE: 0% overlap
Technology Select Sector SPDR Fund and Real Estate Select Sector SPDR Fund share 0.0% 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 2.0. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
XLK and XLRE hold 1 of the same securities. The ten contributing most to the overlap figure:
| Holding | in XLK | in XLRE | Δ |
|---|---|---|---|
| CASH | 0.1% | 0.0% | 0.0% |
Where XLK and XLRE 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 | XLK | XLRE | Δ |
|---|---|---|---|
| Real Estate | 0.0% | 99.9% | −99.9pp |
| Information Technology | 99.9% | 0.0% | +99.9pp |
| Cash and/or Derivatives | 0.1% | 0.0% | +0.0pp |
| Cash & Other | 0.0% | 0.0% | +0.0pp |
| Unclassified | 0.0% | 0.0% | −0.0pp |
Δ is XLK minus XLRE, 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
99.9% of XLK by weight, held in no part of XLRE.
99.9% of XLRE by weight, held in no part of XLK.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| XLK | XLRE | |
|---|---|---|
| Top 10 holdings | 61.3% | 60.6% |
| Positions held | 76 | 34 |
| Cost per $10,000 held, per year | $8 | $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 XLK and XLRE overlap?
XLK and XLRE overlap 0.0% by portfolio weight — largely distinct portfolios. They share 1 holdings. The figure comes from current issuer holdings files (XLK as of 2026-07-23, XLRE as of 2026-07-23).
How is the overlap between XLK and XLRE calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If XLK holds a stock at 6% and XLRE 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 XLK and XLRE?
That depends on your goals — we state facts, not advice. At 0.0% overlap, each fund still contributes meaningfully distinct exposure.
What does XLK own that XLRE doesn't?
XLK holds 76 positions and XLRE holds 34; 74 of XLK's positions don't appear in XLRE at all, and they are 99.9% of XLK by weight.
You probably hold more than two funds
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Related comparisons
Sources: issuer holdings files, XLK as of 2026-07-23, XLRE as of 2026-07-23. Weights are fractions of each fund. Diagnostics, not advice.