SWISX vs VBTLX: 1% overlap
Schwab International Index and Vanguard Total Bond Market Index Admiral share 0.6% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
Different holding dates. These holdings were published about 2 months apart — SWISX as of 2026-04-30, the rest through 2026-06-30. Each fund is compared using its most recent file, so any trading in between shows up as a difference.
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
SWISX and VBTLX hold 1 of the same securities. The ten contributing most to the overlap figure:
| Holding | in SWISX | in VBTLX | Δ |
|---|---|---|---|
| CASH | 0.6% | 1.1% | 0.5% |
Where SWISX and VBTLX 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 | SWISX | VBTLX | Δ |
|---|---|---|---|
| Unclassified | 99.1% | 0.7% | +98.4pp |
| Treasuries | 0.0% | 48.2% | −48.2pp |
| MBS Pass-Through | 0.0% | 20.3% | −20.3pp |
| Corporate — industrial & other | 0.0% | 14.6% | −14.6pp |
| Financials | 0.0% | 7.9% | −7.9pp |
| Utilities | 0.0% | 2.6% | −2.6pp |
| Supranational | 0.0% | 1.4% | −1.4pp |
| Sovereign | 0.0% | 1.2% | −1.2pp |
Δ is SWISX minus VBTLX, 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
99.1% of SWISX by weight, held in no part of VBTLX.
98.9% of VBTLX by weight, held in no part of SWISX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| SWISX | VBTLX | |
|---|---|---|
| Top 10 holdings | 13.3% | 71.7% |
| Positions held | 694 | 2,047 |
| Cost per $10,000 held, per year | $6 | $4 |
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 SWISX and VBTLX overlap?
SWISX and VBTLX overlap 0.6% by portfolio weight — largely distinct portfolios. They share 1 holdings. The figure comes from current issuer holdings files (SWISX as of 2026-04-30, VBTLX as of 2026-06-30).
How is the overlap between SWISX and VBTLX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If SWISX holds a stock at 6% and VBTLX 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 SWISX and VBTLX?
That depends on your goals — we state facts, not advice. At 0.6% overlap, each fund still contributes meaningfully distinct exposure.
What does SWISX own that VBTLX doesn't?
SWISX holds 694 positions and VBTLX holds 2,047; 692 of SWISX's positions don't appear in VBTLX at all, and they are 99.1% of SWISX by weight.
You probably hold more than two funds
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Related comparisons
Sources: issuer holdings files, SWISX as of 2026-04-30, VBTLX as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.