TSPF vs VGIT: 21% overlap
TSP F Fund — shown via aggregate-bond proxy and Vanguard Intermediate-Term Treasury ETF share 21.3% 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 1.8. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
TSPF and VGIT hold 2 of the same securities. The ten contributing most to the overlap figure:
| Holding | in TSPF | in VGIT | Δ |
|---|---|---|---|
| UST-3-10Y | 21.0% | 99.8% | 78.7% |
| CASH | 2.7% | 0.2% | 2.4% |
Where TSPF and VGIT 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 | TSPF | VGIT | Δ |
|---|---|---|---|
| Treasuries | 46.5% | 99.8% | −53.3pp |
| MBS Pass-Through | 24.1% | 0.0% | +24.1pp |
| Corporate — industrial & other | 14.3% | 0.0% | +14.3pp |
| Financials | 8.0% | 0.0% | +8.0pp |
| Utilities | 2.5% | 0.0% | +2.5pp |
| Cash and/or Derivatives | 2.7% | 0.2% | +2.4pp |
| Cash & Other | -2.1% | 0.0% | −2.1pp |
| Sovereign | 1.1% | 0.0% | +1.1pp |
Δ is TSPF minus VGIT, 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
78.4% of TSPF by weight, held in no part of VGIT.
0.0% of VGIT by weight, held in no part of TSPF.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| TSPF | VGIT | |
|---|---|---|
| Top 10 holdings | 75.3% | 100.0% |
| Positions held | 1,864 | 2 |
| 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 TSPF and VGIT overlap?
TSPF and VGIT overlap 21.3% by portfolio weight — moderate overlap. They share 2 holdings. The figure comes from current issuer holdings files (TSPF as of 2026-07-23, VGIT as of 2026-06-30).
How is the overlap between TSPF and VGIT calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If TSPF holds a stock at 6% and VGIT 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 TSPF and VGIT?
That depends on your goals — we state facts, not advice. At 21.3% overlap, each fund still contributes meaningfully distinct exposure.
What does TSPF own that VGIT doesn't?
TSPF holds 1,864 positions and VGIT holds 2; 1,861 of TSPF's positions don't appear in VGIT at all, and they are 78.4% of TSPF by weight.
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Related comparisons
Sources: issuer holdings files, TSPF as of 2026-07-23, VGIT as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.