FFFEX vs VBIAX: 1% overlap
Fidelity Freedom 2030 and Vanguard Balanced Index Admiral share 0.5% 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
FFFEX and VBIAX hold 3 of the same securities. The ten contributing most to the overlap figure:
| Holding | in FFFEX | in VBIAX | Δ |
|---|---|---|---|
| CASH | 0.3% | 1.8% | 1.5% |
| UST | 0.3% | 19.1% | 18.9% |
| RTYM6 | -0.0% | 0.0% | 0.0% |
Where FFFEX and VBIAX 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 | FFFEX | VBIAX | Δ |
|---|---|---|---|
| Unclassified | 99.4% | 55.1% | +44.3pp |
| Treasuries | 0.3% | 19.1% | −18.9pp |
| MBS Pass-Through | 0.0% | 8.1% | −8.1pp |
| Corporate — industrial & other | 0.0% | 5.8% | −5.8pp |
| Financials | 0.0% | 3.6% | −3.6pp |
| Cash and/or Derivatives | 0.3% | 1.8% | −1.5pp |
| Utilities | 0.0% | 1.2% | −1.2pp |
| Health Care | 0.0% | 1.2% | −1.2pp |
Δ is FFFEX minus VBIAX, 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
99.4% of FFFEX by weight, held in no part of VBIAX.
79.9% of VBIAX by weight, held in no part of FFFEX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| FFFEX | VBIAX | |
|---|---|---|
| Top 10 holdings | 70.9% | 45.2% |
| Positions held | 38 | 5,119 |
| Cost per $10,000 held, per year | $71 | $7 |
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 FFFEX and VBIAX overlap?
FFFEX and VBIAX overlap 0.5% by portfolio weight — largely distinct portfolios. They share 3 holdings. The figure comes from current issuer holdings files (FFFEX as of 2026-03-31, VBIAX as of 2026-03-31).
How is the overlap between FFFEX and VBIAX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If FFFEX holds a stock at 6% and VBIAX 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 FFFEX and VBIAX?
That depends on your goals — we state facts, not advice. At 0.5% overlap, each fund still contributes meaningfully distinct exposure.
What does FFFEX own that VBIAX doesn't?
FFFEX holds 38 positions and VBIAX holds 5,119; 34 of FFFEX's positions don't appear in VBIAX at all, and they are 99.4% of FFFEX by weight.
You probably hold more than two funds
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Related comparisons
Sources: issuer holdings files, FFFEX as of 2026-03-31, VBIAX as of 2026-03-31. Weights are fractions of each fund. Diagnostics, not advice.