ETF comparison
IVOOvsSPMD
Both US Mid Cap.
Vanguard S&P Mid-Cap 400 Index Fund ETF Shares · State Street SPDR Portfolio S&P 400 Mid Cap ETF
Holdings overlap
394 positions appear in both funds. Buying equal dollars of IVOO and SPMD would leave roughly93.8%of each dollar exposed to the same underlying securities.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — seewhat we don't scorefor why.
Cost difference
SPMD is 4 bps cheaper than IVOO. On a $100,000 position that's about $40/yr more in fees for IVOO.
Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open thecost calculator pre-filled with IVOO vs SPMD.
Top shared holdings
394 shared in total| # | Holding | In IVOO | In SPMD | Overlap |
|---|---|---|---|---|
| 1 | Twilio Inc | 0.82% | 0.86% | 0.82% |
| 2 | Curtiss-Wright Corp | 0.79% | 0.77% | 0.77% |
| 3 | nVent Electric PLC | 0.77% | 0.76% | 0.76% |
| 4 | TechnipFMC PLC | 0.79% | 0.73% | 0.73% |
| 5 | Illumina Inc | 0.71% | 0.73% | 0.71% |
| 6 | Sterling Infrastructure Inc | 0.75% | 0.71% | 0.71% |
| 7 | Everpure Inc | 0.71% | 0.68% | 0.68% |
| 8 | ATI Inc | 0.68% | 0.74% | 0.68% |
| 9 | MACOM Technology Solutions Holdings Inc | 0.67% | 0.69% | 0.67% |
| 10 | Carpenter Technology Corp | 0.67% | 0.84% | 0.67% |
| 11 | XPO Inc | 0.72% | 0.66% | 0.66% |
| 12 | MasTec Inc | 0.66% | 0.71% | 0.66% |
Only in IVOO
6 total- Flex Ltd1.58%
- Masimo Corp0.23%
- Concentrix Corp0.04%
- Blackbaud Inc0.03%
- BellRing Brands Inc0.03%
- Coty Inc0.02%
Only in SPMD
7 total- Roku Inc0.50%
- Coeur Mining Inc0.46%
- Semtech Corp0.41%
- Sanmina Corp0.37%
- Viavi Solutions Inc0.31%
- Sirius XM Holdings Inc0.15%
- State Street Global Advisors0.00%
Open IVOO or SPMD 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 methodologyand 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.