AIVSX vs VTWNX: 13% overlap
American Funds Investment Company of America A and Vanguard Target Retirement 2020 share 13.0% 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 — AIVSX, VTWNX 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
AIVSX and VTWNX hold 151 of the same securities. The ten contributing most to the overlap figure:
| Holding | in AIVSX | in VTWNX | Δ |
|---|---|---|---|
| NVDA | 6.5% | 1.3% | 5.3% |
| AAPL | 2.2% | 1.2% | 1.1% |
| MSFT | 5.7% | 0.8% | 4.9% |
| AMZN | 4.7% | 0.6% | 4.1% |
| 2330 | 1.6% | 0.6% | 1.0% |
| GOOGL | 2.5% | 0.6% | 1.9% |
| AVGO | 6.1% | 0.5% | 5.6% |
| GOOG | 2.1% | 0.5% | 1.7% |
| META | 2.6% | 0.3% | 2.3% |
| MU | 0.3% | 0.4% | 0.1% |
Where AIVSX and VTWNX 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 | AIVSX | VTWNX | Δ |
|---|---|---|---|
| Unclassified | 5.5% | 29.8% | −24.3pp |
| Information Technology | 29.2% | 10.0% | +19.2pp |
| Treasuries | 0.0% | 17.1% | −17.1pp |
| Health Care | 11.2% | 2.7% | +8.6pp |
| Industrials | 11.8% | 4.0% | +7.8pp |
| Communication Services | 9.9% | 2.3% | +7.6pp |
| MBS Pass-Through | 0.1% | 7.2% | −7.1pp |
| Consumer Discretionary | 10.0% | 2.9% | +7.1pp |
Δ is AIVSX minus VTWNX, 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
4.2% of AIVSX by weight, held in no part of VTWNX.
77.8% of VTWNX by weight, held in no part of AIVSX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| AIVSX | VTWNX | |
|---|---|---|
| Top 10 holdings | 39.5% | 44.9% |
| Positions held | 168 | 7 |
| Cost per $10,000 held, per year | $58 | $8 |
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 AIVSX and VTWNX overlap?
AIVSX and VTWNX overlap 13.0% by portfolio weight — largely distinct portfolios. They share 151 holdings. The figure comes from current issuer holdings files (AIVSX as of 2026-03-31, VTWNX as of 2026-03-31).
How is the overlap between AIVSX and VTWNX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If AIVSX holds a stock at 6% and VTWNX 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 AIVSX and VTWNX?
That depends on your goals — we state facts, not advice. At 13.0% overlap, each fund still contributes meaningfully distinct exposure.
What does AIVSX own that VTWNX doesn't?
AIVSX holds 168 positions and VTWNX holds 7; 17 of AIVSX's positions don't appear in VTWNX at all, and they are 4.2% of AIVSX by weight.
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Related comparisons
Sources: issuer holdings files, AIVSX as of 2026-03-31, VTWNX as of 2026-03-31. Weights are fractions of each fund. Diagnostics, not advice.