RGAGX vs TSPI: 7% overlap
American Funds Growth Fund of America R6 and TSP I Fund — shown via international proxy share 7.3% 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 4 months apart — RGAGX as of 2026-02-28, 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
RGAGX and TSPI hold 50 of the same securities. The ten contributing most to the overlap figure:
| Holding | in RGAGX | in TSPI | Δ |
|---|---|---|---|
| 2330 | 2.3% | 4.3% | 2.0% |
| ASML | 0.8% | 1.7% | 0.9% |
| 000660 | 0.8% | 2.2% | 1.4% |
| SHOP | 1.2% | 0.3% | 0.9% |
| RR- | 0.3% | 0.4% | 0.1% |
| SAP | 0.3% | 0.4% | 0.1% |
| 005930 | 0.2% | 2.3% | 2.0% |
| 9984 | 0.2% | 0.3% | 0.1% |
| BN | 0.2% | 0.3% | 0.1% |
| 6098 | 0.2% | 0.2% | 0.0% |
Where RGAGX 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 | RGAGX | TSPI | Δ |
|---|---|---|---|
| Financials | 6.5% | 19.7% | −13.1pp |
| Communication Services | 13.2% | 3.3% | +10.0pp |
| Information Technology | 30.6% | 20.9% | +9.7pp |
| Health Care | 11.0% | 5.3% | +5.7pp |
| Consumer Discretionary | 12.7% | 7.5% | +5.2pp |
| Industrials | 9.8% | 13.8% | −4.0pp |
| Materials | 1.5% | 5.2% | −3.7pp |
| Utilities | 0.5% | 3.0% | −2.5pp |
Δ is RGAGX 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
88.1% of RGAGX by weight, held in no part of TSPI.
84.4% of TSPI by weight, held in no part of RGAGX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| RGAGX | TSPI | |
|---|---|---|
| Top 10 holdings | 36.7% | 16.3% |
| Positions held | 309 | 8,453 |
| Cost per $10,000 held, per year | $30 | $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 RGAGX and TSPI overlap?
RGAGX and TSPI overlap 7.3% by portfolio weight — largely distinct portfolios. They share 50 holdings. The figure comes from current issuer holdings files (RGAGX as of 2026-02-28, TSPI as of 2026-06-30).
How is the overlap between RGAGX and TSPI calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If RGAGX 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 RGAGX and TSPI?
That depends on your goals — we state facts, not advice. At 7.3% overlap, each fund still contributes meaningfully distinct exposure.
What does RGAGX own that TSPI doesn't?
RGAGX holds 309 positions and TSPI holds 8,453; 258 of RGAGX's positions don't appear in TSPI at all, and they are 88.1% of RGAGX by weight.
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Related comparisons
Sources: issuer holdings files, RGAGX as of 2026-02-28, TSPI as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.