AIVSX vs TSPS: 1% overlap
American Funds Investment Company of America A and TSP S Fund — shown via extended-market proxy share 1.1% 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 TSPS hold 10 of the same securities. The ten contributing most to the overlap figure:
| Holding | in AIVSX | in TSPS | Δ |
|---|---|---|---|
| ALNY | 0.4% | 0.5% | 0.1% |
| FTAI | 0.4% | 0.3% | 0.1% |
| XPO | 0.1% | 0.3% | 0.2% |
| MDLN | 0.1% | 0.2% | 0.1% |
| CASH | 0.1% | 3.8% | 3.7% |
| OWL | 0.2% | 0.1% | 0.1% |
| AIR | 0.1% | 0.1% | 0.0% |
| HEI | 0.0% | 0.2% | 0.2% |
| VSNT | 0.0% | 0.1% | 0.0% |
| MRVL | 0.1% | 0.0% | 0.1% |
Where AIVSX and TSPS 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 | TSPS | Δ |
|---|---|---|---|
| Information Technology | 29.2% | 17.6% | +11.5pp |
| Industrials | 11.8% | 19.8% | −8.0pp |
| Financials | 8.2% | 13.9% | −5.7pp |
| Communication Services | 9.9% | 4.5% | +5.5pp |
| Unclassified | 5.5% | 1.0% | +4.4pp |
| Real Estate | 0.8% | 4.8% | −4.0pp |
| Cash and/or Derivatives | 0.1% | 3.8% | −3.7pp |
| Consumer Staples | 6.4% | 2.7% | +3.6pp |
Δ is AIVSX minus TSPS, 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
98.9% of AIVSX by weight, held in no part of TSPS.
94.6% of TSPS 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 | TSPS | |
|---|---|---|
| Top 10 holdings | 39.5% | 10.6% |
| Positions held | 168 | 3,327 |
| 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 TSPS overlap?
AIVSX and TSPS overlap 1.1% by portfolio weight — largely distinct portfolios. They share 10 holdings. The figure comes from current issuer holdings files (AIVSX as of 2026-03-31, TSPS as of 2026-06-30).
How is the overlap between AIVSX and TSPS 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 TSPS 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 TSPS?
That depends on your goals — we state facts, not advice. At 1.1% overlap, each fund still contributes meaningfully distinct exposure.
What does AIVSX own that TSPS doesn't?
AIVSX holds 168 positions and TSPS holds 3,327; 158 of AIVSX's positions don't appear in TSPS at all, and they are 98.9% of AIVSX by weight.
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Related comparisons
Sources: issuer holdings files, AIVSX as of 2026-03-31, TSPS as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.