SPYM vs VUG: 57% overlap
State Street SPDR Portfolio S&P 500 ETF and Vanguard Growth ETF share 56.8% 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 1.4. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
SPYM and VUG hold 122 of the same securities. The ten contributing most to the overlap figure:
| Holding | in SPYM | in VUG | Δ |
|---|---|---|---|
| NVDA | 7.9% | 12.6% | 4.7% |
| AAPL | 7.4% | 11.6% | 4.2% |
| MSFT | 4.4% | 7.6% | 3.1% |
| AMZN | 3.6% | 4.5% | 0.9% |
| GOOGL | 2.9% | 5.7% | 2.8% |
| AVGO | 2.9% | 4.3% | 1.4% |
| GOOG | 2.4% | 4.5% | 2.2% |
| META | 2.1% | 3.4% | 1.3% |
| LLY | 1.5% | 2.8% | 1.3% |
| TSLA | 1.4% | 3.3% | 1.8% |
Where SPYM and VUG 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 | VUG | Δ |
|---|---|---|---|
| Information Technology | 37.5% | 56.0% | −18.5pp |
| Financials | 12.4% | 3.9% | +8.4pp |
| Communication Services | 9.3% | 15.3% | −6.0pp |
| Health Care | 9.1% | 4.7% | +4.5pp |
| Industrials | 8.9% | 5.0% | +3.9pp |
| Consumer Staples | 4.6% | 1.4% | +3.2pp |
| Energy | 3.4% | 0.3% | +3.1pp |
| Consumer Discretionary | 8.7% | 11.4% | −2.7pp |
Δ is SPYM minus VUG, 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
43.1% of SPYM by weight, held in no part of VUG.
2.6% of VUG 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 | VUG | |
|---|---|---|
| Top 10 holdings | 36.9% | 60.3% |
| Positions held | 507 | 147 |
| Cost per $10,000 held, per year | $2 | $3 |
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 VUG overlap?
SPYM and VUG overlap 56.8% by portfolio weight — substantial duplication if you hold both. They share 122 holdings. The figure comes from current issuer holdings files (SPYM as of 2026-07-23, VUG as of 2026-06-30).
How is the overlap between SPYM and VUG 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 VUG 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 VUG?
That depends on your goals — we state facts, not advice. At 56.8% overlap, each fund still contributes meaningfully distinct exposure.
What does SPYM own that VUG doesn't?
SPYM holds 507 positions and VUG holds 147; 384 of SPYM's positions don't appear in VUG at all, and they are 43.1% of SPYM by weight.
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Related comparisons
Sources: issuer holdings files, SPYM as of 2026-07-23, VUG as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.