AIVSX vs TSPI: 5% overlap
American Funds Investment Company of America A and TSP I Fund — shown via international proxy share 4.5% 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 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 2.0. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
AIVSX and TSPI hold 30 of the same securities. The ten contributing most to the overlap figure:
| Holding | in AIVSX | in TSPI | Δ |
|---|---|---|---|
| 2330 | 1.6% | 4.3% | 2.7% |
| RR- | 0.7% | 0.4% | 0.4% |
| SHOP | 0.4% | 0.3% | 0.1% |
| ASML | 0.3% | 1.7% | 1.4% |
| 9984 | 0.3% | 0.3% | 0.0% |
| BATS | 2.6% | 0.3% | 2.4% |
| 6098 | 0.3% | 0.2% | 0.1% |
| CNQ | 1.0% | 0.2% | 0.8% |
| BA- | 0.2% | 0.2% | 0.0% |
| TRP | 0.3% | 0.2% | 0.1% |
Where AIVSX and TSPI 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 | TSPI | Δ |
|---|---|---|---|
| Financials | 8.2% | 19.7% | −11.5pp |
| Information Technology | 29.2% | 20.9% | +8.3pp |
| Communication Services | 9.9% | 3.3% | +6.6pp |
| Health Care | 11.2% | 5.3% | +6.0pp |
| Unclassified | 5.5% | 9.1% | −3.7pp |
| Consumer Discretionary | 10.0% | 7.5% | +2.5pp |
| Cash and/or Derivatives | 0.1% | 2.5% | −2.4pp |
| Materials | 3.1% | 5.2% | −2.1pp |
Δ is AIVSX minus TSPI, 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
89.5% of AIVSX by weight, held in no part of TSPI.
88.6% of TSPI 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 | TSPI | |
|---|---|---|
| Top 10 holdings | 39.5% | 16.3% |
| Positions held | 168 | 8,453 |
| Cost per $10,000 held, per year | $58 | $5 |
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 TSPI overlap?
AIVSX and TSPI overlap 4.5% by portfolio weight — largely distinct portfolios. They share 30 holdings. The figure comes from current issuer holdings files (AIVSX as of 2026-03-31, TSPI as of 2026-06-30).
How is the overlap between AIVSX and TSPI 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 TSPI 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 TSPI?
That depends on your goals — we state facts, not advice. At 4.5% overlap, each fund still contributes meaningfully distinct exposure.
What does AIVSX own that TSPI doesn't?
AIVSX holds 168 positions and TSPI holds 8,453; 138 of AIVSX's positions don't appear in TSPI at all, and they are 89.5% of AIVSX by weight.
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Related comparisons
Sources: issuer holdings files, AIVSX as of 2026-03-31, TSPI as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.