VBIAX vs VCIT: 9% overlap
Vanguard Balanced Index Admiral and Vanguard Intermediate-Term Corporate Bond ETF share 8.9% 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 3 months apart — VBIAX as of 2026-03-31, 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 1.9. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
VBIAX and VCIT hold 783 of the same securities. The ten contributing most to the overlap figure:
| Holding | in VBIAX | in VCIT | Δ |
|---|---|---|---|
| 46647P | 0.2% | 2.7% | 2.5% |
| 06051G | 0.2% | 2.4% | 2.2% |
| 68389X | 0.1% | 1.2% | 1.0% |
| 61747Y | 0.1% | 2.0% | 1.9% |
| 95000U | 0.1% | 1.6% | 1.5% |
| 38141G | 0.1% | 1.6% | 1.5% |
| 023135 | 0.1% | 1.0% | 0.9% |
| 404280 | 0.1% | 1.6% | 1.5% |
| 172967 | 0.1% | 1.0% | 0.9% |
| 00206R | 0.1% | 0.9% | 0.8% |
Where VBIAX and VCIT 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 | VBIAX | VCIT | Δ |
|---|---|---|---|
| Unclassified | 55.1% | 0.4% | +54.7pp |
| Corporate — industrial & other | 5.8% | 52.7% | −47.0pp |
| Financials | 3.6% | 36.8% | −33.1pp |
| Treasuries | 19.1% | 0.0% | +19.1pp |
| Utilities | 1.2% | 10.0% | −8.8pp |
| MBS Pass-Through | 8.1% | 0.0% | +8.1pp |
| Cash and/or Derivatives | 1.8% | 0.1% | +1.7pp |
| Health Care | 1.2% | 0.0% | +1.2pp |
Δ is VBIAX minus VCIT, 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
90.1% of VBIAX by weight, held in no part of VCIT.
1.5% of VCIT by weight, held in no part of VBIAX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| VBIAX | VCIT | |
|---|---|---|
| Top 10 holdings | 45.2% | 16.6% |
| Positions held | 5,119 | 824 |
| Cost per $10,000 held, per year | $7 | $3 |
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 VBIAX and VCIT overlap?
VBIAX and VCIT overlap 8.9% by portfolio weight — largely distinct portfolios. They share 783 holdings. The figure comes from current issuer holdings files (VBIAX as of 2026-03-31, VCIT as of 2026-06-30).
How is the overlap between VBIAX and VCIT calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If VBIAX holds a stock at 6% and VCIT 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 VBIAX and VCIT?
That depends on your goals — we state facts, not advice. At 8.9% overlap, each fund still contributes meaningfully distinct exposure.
What does VBIAX own that VCIT doesn't?
VBIAX holds 5,119 positions and VCIT holds 824; 4,335 of VBIAX's positions don't appear in VCIT at all, and they are 90.1% of VBIAX by weight.
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Related comparisons
Sources: issuer holdings files, VBIAX as of 2026-03-31, VCIT as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.