RGAGX vs TRRBX: 0% overlap
American Funds Growth Fund of America R6 and T. Rowe Price Retirement 2020 share 0.0% 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
RGAGX and TRRBX hold 0 of the same securities. The ten contributing most to the overlap figure:
| Holding | in RGAGX | in TRRBX | Δ |
|---|
Where RGAGX and TRRBX 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 | TRRBX | Δ |
|---|---|---|---|
| Unclassified | 7.6% | 99.9% | −92.3pp |
| Information Technology | 30.6% | 0.0% | +30.6pp |
| Communication Services | 13.2% | 0.0% | +13.2pp |
| Consumer Discretionary | 12.7% | 0.0% | +12.7pp |
| Health Care | 11.0% | 0.0% | +11.0pp |
| Industrials | 9.8% | 0.0% | +9.8pp |
| Financials | 6.5% | 0.0% | +6.5pp |
| Consumer Staples | 2.4% | 0.0% | +2.4pp |
Δ is RGAGX minus TRRBX, 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 RGAGX by weight, held in no part of TRRBX.
99.9% of TRRBX 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 | TRRBX | |
|---|---|---|
| Top 10 holdings | 36.7% | 69.2% |
| Positions held | 309 | 31 |
| Cost per $10,000 held, per year | $30 | $53 |
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 TRRBX overlap?
RGAGX and TRRBX overlap 0.0% by portfolio weight — largely distinct portfolios. They share 0 holdings. The figure comes from current issuer holdings files (RGAGX as of 2026-02-28, TRRBX as of 2026-02-28).
How is the overlap between RGAGX and TRRBX 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 TRRBX 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 TRRBX?
That depends on your goals — we state facts, not advice. At 0.0% overlap, each fund still contributes meaningfully distinct exposure.
What does RGAGX own that TRRBX doesn't?
RGAGX holds 309 positions and TRRBX holds 31; 308 of RGAGX's positions don't appear in TRRBX at all, and they are 98.9% of RGAGX by weight.
You probably hold more than two funds
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Related comparisons
Sources: issuer holdings files, RGAGX as of 2026-02-28, TRRBX as of 2026-02-28. Weights are fractions of each fund. Diagnostics, not advice.