IWD vs VTTSX: 32% overlap
iShares Russell 1000 Value ETF and Vanguard Target Retirement 2060 share 31.6% 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 — VTTSX as of 2026-03-31, the rest through 2026-07-23. 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 1.7. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
IWD and VTTSX hold 846 of the same securities. The ten contributing most to the overlap figure:
| Holding | in IWD | in VTTSX | Δ |
|---|---|---|---|
| AAPL | 5.9% | 3.1% | 2.8% |
| MSFT | 3.9% | 2.0% | 1.9% |
| AMZN | 5.7% | 1.7% | 4.1% |
| META | 0.7% | 0.9% | 0.2% |
| BRK-B | 2.5% | 0.7% | 1.9% |
| JPM | 2.6% | 0.6% | 2.0% |
| JNJ | 1.7% | 0.4% | 1.3% |
| XOM | 1.8% | 0.4% | 1.4% |
| INTC | 1.2% | 0.4% | 0.8% |
| WMT | 1.2% | 0.4% | 0.8% |
Where IWD and VTTSX 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 | IWD | VTTSX | Δ |
|---|---|---|---|
| Information Technology | 18.0% | 26.3% | −8.3pp |
| Unclassified | 0.0% | 6.1% | −6.1pp |
| Health Care | 12.7% | 7.0% | +5.7pp |
| Financials | 19.6% | 14.1% | +5.4pp |
| Consumer Staples | 7.4% | 4.1% | +3.3pp |
| Energy | 6.1% | 2.8% | +3.3pp |
| Treasuries | 0.0% | 3.3% | −3.3pp |
| Communication Services | 3.3% | 6.0% | −2.7pp |
Δ is IWD minus VTTSX, 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
0.4% of IWD by weight, held in no part of VTTSX.
65.5% of VTTSX by weight, held in no part of IWD.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| IWD | VTTSX | |
|---|---|---|
| Top 10 holdings | 27.8% | 19.3% |
| Positions held | 872 | 6 |
| Cost per $10,000 held, per year | $19 | $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 IWD and VTTSX overlap?
IWD and VTTSX overlap 31.6% by portfolio weight — moderate overlap. They share 846 holdings. The figure comes from current issuer holdings files (IWD as of 2026-07-23, VTTSX as of 2026-03-31).
How is the overlap between IWD and VTTSX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If IWD holds a stock at 6% and VTTSX 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 IWD and VTTSX?
That depends on your goals — we state facts, not advice. At 31.6% overlap, each fund still contributes meaningfully distinct exposure.
What does IWD own that VTTSX doesn't?
IWD holds 872 positions and VTTSX holds 6; 25 of IWD's positions don't appear in VTTSX at all, and they are 0.4% of IWD by weight.
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Related comparisons
Sources: issuer holdings files, IWD as of 2026-07-23, VTTSX as of 2026-03-31. Weights are fractions of each fund. Diagnostics, not advice.