BNDX vs FXAIX: 1% overlap
Vanguard Total International Bond ETF and Fidelity 500 Index share 0.9% 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 4 months apart — FXAIX as of 2026-02-28, 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
BNDX and FXAIX hold 38 of the same securities. The ten contributing most to the overlap figure:
| Holding | in BNDX | in FXAIX | Δ |
|---|---|---|---|
| CASH | 1.3% | 0.3% | 1.1% |
| BAC | 0.1% | 0.6% | 0.5% |
| MS | 0.1% | 0.3% | 0.3% |
| JPM | 0.1% | 1.4% | 1.3% |
| Q | 0.0% | 0.0% | 0.0% |
| GS | 0.0% | 0.4% | 0.4% |
| MCD | 0.0% | 0.4% | 0.4% |
| MET | 0.0% | 0.1% | 0.0% |
| DLR | 0.0% | 0.1% | 0.1% |
| VZ | 0.0% | 0.4% | 0.3% |
Where BNDX and FXAIX 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 | FXAIX | Δ |
|---|---|---|---|
| Unclassified | 88.4% | 3.3% | +85.1pp |
| Information Technology | 0.1% | 31.8% | −31.7pp |
| Communication Services | 0.1% | 10.5% | −10.4pp |
| Financials | 2.0% | 12.0% | −10.0pp |
| Consumer Discretionary | 0.2% | 9.7% | −9.4pp |
| Health Care | 0.2% | 9.6% | −9.4pp |
| Industrials | 0.0% | 8.3% | −8.3pp |
| Consumer Staples | 0.1% | 5.4% | −5.2pp |
Δ is BNDX minus FXAIX, 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
98.0% of BNDX by weight, held in no part of FXAIX.
76.7% of FXAIX 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 | FXAIX | |
|---|---|---|
| Top 10 holdings | 24.4% | 36.4% |
| Positions held | 3,115 | 506 |
| Cost per $10,000 held, per year | $7 | $1 |
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 FXAIX overlap?
BNDX and FXAIX overlap 0.9% by portfolio weight — largely distinct portfolios. They share 38 holdings. The figure comes from current issuer holdings files (BNDX as of 2026-06-30, FXAIX as of 2026-02-28).
How is the overlap between BNDX and FXAIX 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 FXAIX 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 FXAIX?
That depends on your goals — we state facts, not advice. At 0.9% overlap, each fund still contributes meaningfully distinct exposure.
What does BNDX own that FXAIX doesn't?
BNDX holds 3,115 positions and FXAIX holds 506; 3,077 of BNDX's positions don't appear in FXAIX at all, and they are 98.0% of BNDX by weight.
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Related comparisons
Sources: issuer holdings files, BNDX as of 2026-06-30, FXAIX as of 2026-02-28. Weights are fractions of each fund. Diagnostics, not advice.