TSPF vs VTWAX: 1% overlap
TSP F Fund — shown via aggregate-bond proxy and Vanguard Total World Stock Index Admiral share 1.0% 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
TSPF and VTWAX hold 1 of the same securities. The ten contributing most to the overlap figure:
| Holding | in TSPF | in VTWAX | Δ |
|---|---|---|---|
| CASH | 2.7% | 1.0% | 1.7% |
Where TSPF and VTWAX 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 | VTWAX | Δ |
|---|---|---|---|
| Treasuries | 46.5% | 0.0% | +46.5pp |
| Information Technology | 0.0% | 30.1% | −30.1pp |
| MBS Pass-Through | 24.1% | 0.0% | +24.1pp |
| Corporate — industrial & other | 14.3% | 0.0% | +14.3pp |
| Industrials | 0.0% | 11.5% | −11.5pp |
| Consumer Discretionary | 0.0% | 8.6% | −8.6pp |
| Health Care | 0.0% | 7.7% | −7.7pp |
| Communication Services | 0.0% | 7.0% | −7.0pp |
Δ is TSPF minus VTWAX, 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
99.4% of TSPF by weight, held in no part of VTWAX.
99.0% of VTWAX 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 | VTWAX | |
|---|---|---|
| Top 10 holdings | 75.3% | 20.5% |
| Positions held | 1,864 | 9,600 |
| Cost per $10,000 held, per year | $5 | $9 |
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 VTWAX overlap?
TSPF and VTWAX overlap 1.0% by portfolio weight — largely distinct portfolios. They share 1 holdings. The figure comes from current issuer holdings files (TSPF as of 2026-07-23, VTWAX as of 2026-06-30).
How is the overlap between TSPF and VTWAX 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 VTWAX 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 VTWAX?
That depends on your goals — we state facts, not advice. At 1.0% overlap, each fund still contributes meaningfully distinct exposure.
What does TSPF own that VTWAX doesn't?
TSPF holds 1,864 positions and VTWAX holds 9,600; 1,862 of TSPF's positions don't appear in VTWAX at all, and they are 99.4% of TSPF by weight.
You probably hold more than two funds
This page compares TSPF and VTWAX. Paste your whole portfolio — brokerage, 401(k), IRA — and see the overlap across every fund at once, plus what you actually own underneath them and your own Effective Funds number. Free, no account, nothing stored.
X-ray my portfolio — free →Watch TSPF vs VTWAX
We re-read both funds’ published holdings every weeknight. Leave an address and we'll tell you when what's inside actually changes.
Not sending yet — email alerts are built but switched off, and you'll be among the first when they turn on. No spam, one-click unsubscribe.
Related comparisons
Sources: issuer holdings files, TSPF as of 2026-07-23, VTWAX as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.