BNDX vs IWM: 0% overlap
Vanguard Total International Bond ETF and iShares Russell 2000 ETF share 0.3% 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 2.0. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
BNDX and IWM hold 6 of the same securities. The ten contributing most to the overlap figure:
| Holding | in BNDX | in IWM | Δ |
|---|---|---|---|
| CASH | 1.3% | 0.2% | 1.2% |
| KTB | 0.2% | 0.1% | 0.0% |
| AVLN | 0.0% | 0.0% | 0.0% |
| ONT | 0.0% | 0.0% | 0.0% |
| EU | 0.6% | 0.0% | 0.6% |
| DXC | 0.0% | 0.1% | 0.1% |
Where BNDX and IWM 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 | IWM | Δ |
|---|---|---|---|
| Unclassified | 88.4% | 0.0% | +88.4pp |
| Health Care | 0.2% | 19.9% | −19.7pp |
| Financials | 2.0% | 19.0% | −17.0pp |
| Industrials | 0.0% | 14.7% | −14.7pp |
| Information Technology | 0.1% | 12.8% | −12.7pp |
| Consumer Discretionary | 0.2% | 9.4% | −9.2pp |
| Real Estate | 0.0% | 5.9% | −5.9pp |
| Energy | 0.7% | 6.1% | −5.4pp |
Δ is BNDX minus IWM, 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
97.8% of BNDX by weight, held in no part of IWM.
99.6% of IWM 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 | IWM | |
|---|---|---|
| Top 10 holdings | 24.4% | 3.3% |
| Positions held | 3,115 | 1,967 |
| Cost per $10,000 held, per year | $7 | $19 |
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 IWM overlap?
BNDX and IWM overlap 0.3% by portfolio weight — largely distinct portfolios. They share 6 holdings. The figure comes from current issuer holdings files (BNDX as of 2026-06-30, IWM as of 2026-07-23).
How is the overlap between BNDX and IWM 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 IWM 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 IWM?
That depends on your goals — we state facts, not advice. At 0.3% overlap, each fund still contributes meaningfully distinct exposure.
What does BNDX own that IWM doesn't?
BNDX holds 3,115 positions and IWM holds 1,967; 3,109 of BNDX's positions don't appear in IWM at all, and they are 97.8% of BNDX by weight.
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Related comparisons
Sources: issuer holdings files, BNDX as of 2026-06-30, IWM as of 2026-07-23. Weights are fractions of each fund. Diagnostics, not advice.