SPYM vs VFORX: 39% overlap
State Street SPDR Portfolio S&P 500 ETF and Vanguard Target Retirement 2040 share 38.6% 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 — VFORX 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 1.6. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
SPYM and VFORX hold 502 of the same securities. The ten contributing most to the overlap figure:
| Holding | in SPYM | in VFORX | Δ |
|---|---|---|---|
| NVDA | 7.9% | 2.8% | 5.2% |
| AAPL | 7.4% | 2.5% | 4.9% |
| MSFT | 4.4% | 1.7% | 2.8% |
| AMZN | 3.6% | 1.4% | 2.2% |
| GOOGL | 2.9% | 1.3% | 1.7% |
| AVGO | 2.9% | 1.1% | 1.8% |
| GOOG | 2.4% | 1.0% | 1.4% |
| MU | 1.8% | 0.8% | 1.0% |
| META | 2.1% | 0.7% | 1.3% |
| TSLA | 1.4% | 0.7% | 0.7% |
Where SPYM and VFORX 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 | SPYM | VFORX | Δ |
|---|---|---|---|
| Information Technology | 37.5% | 21.6% | +15.9pp |
| Unclassified | 0.0% | 9.7% | −9.7pp |
| Treasuries | 0.0% | 8.7% | −8.7pp |
| Communication Services | 9.3% | 4.9% | +4.4pp |
| MBS Pass-Through | 0.0% | 3.7% | −3.7pp |
| Health Care | 9.1% | 5.8% | +3.4pp |
| Corporate — industrial & other | 0.0% | 2.8% | −2.8pp |
| Consumer Discretionary | 8.7% | 6.3% | +2.5pp |
Δ is SPYM minus VFORX, 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
0.1% of SPYM by weight, held in no part of VFORX.
59.3% of VFORX by weight, held in no part of SPYM.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| SPYM | VFORX | |
|---|---|---|
| Top 10 holdings | 36.9% | 23.9% |
| Positions held | 507 | 6 |
| Cost per $10,000 held, per year | $2 | $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 SPYM and VFORX overlap?
SPYM and VFORX overlap 38.6% by portfolio weight — moderate overlap. They share 502 holdings. The figure comes from current issuer holdings files (SPYM as of 2026-07-23, VFORX as of 2026-03-31).
How is the overlap between SPYM and VFORX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If SPYM holds a stock at 6% and VFORX 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 SPYM and VFORX?
That depends on your goals — we state facts, not advice. At 38.6% overlap, each fund still contributes meaningfully distinct exposure.
What does SPYM own that VFORX doesn't?
SPYM holds 507 positions and VFORX holds 6; 4 of SPYM's positions don't appear in VFORX at all, and they are 0.1% of SPYM by weight.
You probably hold more than two funds
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Related comparisons
Sources: issuer holdings files, SPYM as of 2026-07-23, VFORX as of 2026-03-31. Weights are fractions of each fund. Diagnostics, not advice.