BNDX vs DIA: 0% overlap
Vanguard Total International Bond ETF and SPDR Dow Jones Industrial Average ETF share 0.2% 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
BNDX and DIA hold 7 of the same securities. The ten contributing most to the overlap figure:
| Holding | in BNDX | in DIA | Δ |
|---|---|---|---|
| JPM | 0.1% | 4.0% | 4.0% |
| GS | 0.0% | 12.3% | 12.3% |
| MCD | 0.0% | 3.0% | 3.0% |
| MSFT | 0.0% | 4.4% | 4.4% |
| AMGN | 0.0% | 4.3% | 4.3% |
| AAPL | 0.0% | 3.7% | 3.7% |
| MRK | 0.0% | 1.5% | 1.5% |
Where BNDX and DIA 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 | BNDX | DIA | Δ |
|---|---|---|---|
| Unclassified | 88.4% | 0.0% | +88.4pp |
| Financials | 2.0% | 28.6% | −26.7pp |
| Industrials | 0.0% | 17.5% | −17.4pp |
| Information Technology | 0.1% | 15.9% | −15.8pp |
| Health Care | 0.2% | 13.6% | −13.5pp |
| Consumer Discretionary | 0.2% | 9.9% | −9.7pp |
| Communication Services | 0.1% | 4.7% | −4.6pp |
| Consumer Staples | 0.1% | 3.9% | −3.7pp |
Δ is BNDX minus DIA, 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
99.8% of BNDX by weight, held in no part of DIA.
66.7% of DIA by weight, held in no part of BNDX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| BNDX | DIA | |
|---|---|---|
| Top 10 holdings | 24.4% | 56.2% |
| Positions held | 3,115 | 31 |
| Cost per $10,000 held, per year | $7 | $16 |
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 BNDX and DIA overlap?
BNDX and DIA overlap 0.2% by portfolio weight — largely distinct portfolios. They share 7 holdings. The figure comes from current issuer holdings files (BNDX as of 2026-06-30, DIA as of 2026-07-23).
How is the overlap between BNDX and DIA calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If BNDX holds a stock at 6% and DIA 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 BNDX and DIA?
That depends on your goals — we state facts, not advice. At 0.2% overlap, each fund still contributes meaningfully distinct exposure.
What does BNDX own that DIA doesn't?
BNDX holds 3,115 positions and DIA holds 31; 3,108 of BNDX's positions don't appear in DIA at all, and they are 99.8% of BNDX by weight.
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Related comparisons
Sources: issuer holdings files, BNDX as of 2026-06-30, DIA as of 2026-07-23. Weights are fractions of each fund. Diagnostics, not advice.