ETF comparison
SPYM vs VO
US Large Cap vs US Mid Cap.
State Street SPDR Portfolio S&P 500 ETF · Vanguard Morningstar Mid-Cap ETF
Holdings overlap
248 positions appear in both funds. Buying equal dollars of SPYM and VO would leave roughly 16.4% of each dollar exposed to the same underlying securities.
Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
SPYM is 1 bps cheaper than VO. On a $100,000 position that's about $10/yr more in fees for VO.
Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with SPYM vs VO.
Top shared holdings
248 shared in total| # | Holding | In SPYM | In VO | Overlap |
|---|---|---|---|---|
| 1 | Western Digital Corp | 0.34% | 1.06% | 0.34% |
| 2 | Seagate Technology Holdings PLC | 0.34% | 1.05% | 0.34% |
| 3 | Vertiv Holdings Co | 0.20% | 1.22% | 0.20% |
| 4 | Quanta Services Inc | 0.17% | 1.04% | 0.17% |
| 5 | Howmet Aerospace Inc | 0.17% | 1.04% | 0.17% |
| 6 | Newmont Corp | 0.15% | 0.48% | 0.15% |
| 7 | Cummins Inc | 0.15% | 0.95% | 0.15% |
| 8 | Fortinet Inc | 0.15% | 0.46% | 0.15% |
| 9 | Williams Cos Inc/The | 0.14% | 0.44% | 0.14% |
| 10 | Johnson Controls International plc | 0.14% | 0.43% | 0.14% |
| 11 | Datadog Inc | 0.13% | 0.83% | 0.13% |
| 12 | Constellation Energy Corp | 0.12% | 0.78% | 0.12% |
Only in SPYM
258 total- NVIDIA Corp 7.51%
- Apple Inc 6.59%
- Microsoft Corp 4.29%
- Amazon.com Inc 3.62%
- Alphabet Inc 3.25%
- Broadcom Inc 2.77%
- Alphabet Inc 2.59%
- Micron Technology Inc 2.02%
- Meta Platforms Inc 1.92%
- Tesla Inc 1.83%
Only in VO
34 total- Bloom Energy Corp 0.79%
- Cloudflare Inc 0.76%
- Rocket Lab Corp 0.57%
- Cheniere Energy Inc 0.48%
- Ferguson Enterprises Inc 0.45%
- Waste Connections Inc 0.41%
- Snowflake Inc 0.41%
- Alnylam Pharmaceuticals Inc 0.39%
- Coreweave Inc 0.37%
- Astera Labs Inc 0.36%
Related comparisons
More comparisons with SPYM
- SPYM vs SPLV · Invesco S&P 500 Low Volatility ETF 16.4%
- SPYM vs MOAT · VanEck Morningstar Wide Moat ETF 14.7%
- SPYM vs SDY · State Street SPDR S&P Dividend ETF 14.1%
- SPYM vs IWR · iShares Russell Mid-Cap ETF 13.3%
- SPYM vs VLUE · iShares MSCI USA Value Factor ETF 13.2%
- SPYM vs IWS · iShares Russell Mid-Cap Value ETF 11.5%
Percentages are holdings overlap with the named fund.
Open SPYM or VO at a brokerage
Both funds trade commission-free at major US brokerages.
Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.
Holdings overlap is the sum of min(weight_a, weight_b) over positions
matched on ISIN (CUSIP fallback). Methodology: see
/methodology/.
Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.