QQQ vs TSPI: 2% overlap
Invesco QQQ Trust and TSP I Fund — shown via international proxy share 1.7% 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
QQQ and TSPI hold 12 of the same securities. The ten contributing most to the overlap figure:
| Holding | in QQQ | in TSPI | Δ |
|---|---|---|---|
| ASML | 0.8% | 1.7% | 0.9% |
| SHOP | 0.6% | 0.3% | 0.3% |
| ROP | 0.2% | 0.6% | 0.5% |
| CASH | 0.1% | 2.4% | 2.3% |
| PDD | 0.3% | 0.1% | 0.1% |
| FER | 0.2% | 0.1% | 0.1% |
| CCEP | 0.2% | 0.0% | 0.2% |
| TRI | 0.1% | 0.0% | 0.1% |
| ADP | 0.4% | 0.0% | 0.4% |
| WBD | 0.3% | 0.0% | 0.3% |
Where QQQ and TSPI 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 | QQQ | TSPI | Δ |
|---|---|---|---|
| Information Technology | 59.1% | 20.9% | +38.2pp |
| Financials | 0.2% | 19.7% | −19.5pp |
| Industrials | 3.5% | 13.8% | −10.3pp |
| Communication Services | 13.1% | 3.3% | +9.9pp |
| Unclassified | 1.0% | 9.1% | −8.1pp |
| Materials | 1.1% | 5.2% | −4.1pp |
| Consumer Discretionary | 10.0% | 7.5% | +2.5pp |
| Energy | 0.5% | 3.0% | −2.5pp |
Δ is QQQ minus TSPI, 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
95.5% of QQQ by weight, held in no part of TSPI.
94.6% of TSPI by weight, held in no part of QQQ.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| QQQ | TSPI | |
|---|---|---|
| Top 10 holdings | 45.9% | 16.3% |
| Positions held | 104 | 8,453 |
| Cost per $10,000 held, per year | $20 | $5 |
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 QQQ and TSPI overlap?
QQQ and TSPI overlap 1.7% by portfolio weight — largely distinct portfolios. They share 12 holdings. The figure comes from current issuer holdings files (QQQ as of 2026-07-23, TSPI as of 2026-06-30).
How is the overlap between QQQ and TSPI calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If QQQ holds a stock at 6% and TSPI 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 QQQ and TSPI?
That depends on your goals — we state facts, not advice. At 1.7% overlap, each fund still contributes meaningfully distinct exposure.
What does QQQ own that TSPI doesn't?
QQQ holds 104 positions and TSPI holds 8,453; 92 of QQQ's positions don't appear in TSPI at all, and they are 95.5% of QQQ by weight.
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Related comparisons
Sources: issuer holdings files, QQQ as of 2026-07-23, TSPI as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.