TSPI vs VUG: 1% overlap
TSP I Fund — shown via international proxy and Vanguard Growth ETF share 0.6% 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
TSPI and VUG hold 11 of the same securities. The ten contributing most to the overlap figure:
| Holding | in TSPI | in VUG | Δ |
|---|---|---|---|
| CASH | 2.4% | 0.3% | 2.1% |
| WCN | 0.1% | 0.1% | 0.0% |
| SUNB | 0.1% | 0.1% | 0.0% |
| HEI-A | 0.0% | 0.1% | 0.0% |
| HEI | 0.1% | 0.0% | 0.0% |
| EQT | 0.0% | 0.0% | 0.0% |
| TKO | 0.0% | 0.0% | 0.0% |
| ECL | 0.0% | 0.2% | 0.2% |
| LULU | 0.0% | 0.0% | 0.0% |
| STX | 0.0% | 0.6% | 0.6% |
Where TSPI and VUG 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 | TSPI | VUG | Δ |
|---|---|---|---|
| Information Technology | 20.9% | 56.0% | −35.1pp |
| Financials | 19.7% | 3.9% | +15.7pp |
| Communication Services | 3.3% | 15.3% | −12.1pp |
| Unclassified | 9.1% | 0.1% | +9.0pp |
| Industrials | 13.8% | 5.0% | +8.8pp |
| Materials | 5.2% | 0.6% | +4.6pp |
| Consumer Discretionary | 7.5% | 11.4% | −3.9pp |
| Consumer Staples | 4.9% | 1.4% | +3.4pp |
Δ is TSPI minus VUG, 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
97.3% of TSPI by weight, held in no part of VUG.
98.4% of VUG by weight, held in no part of TSPI.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| TSPI | VUG | |
|---|---|---|
| Top 10 holdings | 16.3% | 60.3% |
| Positions held | 8,453 | 147 |
| Cost per $10,000 held, per year | $5 | $3 |
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 TSPI and VUG overlap?
TSPI and VUG overlap 0.6% by portfolio weight — largely distinct portfolios. They share 11 holdings. The figure comes from current issuer holdings files (TSPI as of 2026-06-30, VUG as of 2026-06-30).
How is the overlap between TSPI and VUG calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If TSPI holds a stock at 6% and VUG 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 TSPI and VUG?
That depends on your goals — we state facts, not advice. At 0.6% overlap, each fund still contributes meaningfully distinct exposure.
What does TSPI own that VUG doesn't?
TSPI holds 8,453 positions and VUG holds 147; 8,442 of TSPI's positions don't appear in VUG at all, and they are 97.3% of TSPI by weight.
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Related comparisons
Sources: issuer holdings files, TSPI as of 2026-06-30, VUG as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.