ETF comparison
IVOO vs SPMD
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 roughly 93.9% of each dollar exposed to the same underlying securities.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for 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 the cost calculator pre-filled with IVOO vs SPMD.
Top shared holdings
394 shared in total| # | Holding | In IVOO | In SPMD | Overlap |
|---|---|---|---|---|
| 1 | TechnipFMC PLC | 0.78% | 0.87% | 0.78% |
| 2 | Curtiss-Wright Corp | 0.75% | 0.79% | 0.75% |
| 3 | Casey's General Stores Inc | 0.74% | 0.84% | 0.74% |
| 4 | XPO Inc | 0.72% | 0.71% | 0.71% |
| 5 | Flex Ltd | 0.68% | 0.75% | 0.68% |
| 6 | Woodward Inc | 0.67% | 0.67% | 0.67% |
| 7 | Royal Gold Inc | 0.70% | 0.64% | 0.64% |
| 8 | United Therapeutics Corp | 0.63% | 0.80% | 0.63% |
| 9 | US Foods Holding Corp | 0.62% | 0.64% | 0.62% |
| 10 | ATI Inc | 0.64% | 0.62% | 0.62% |
| 11 | Illumina Inc | 0.60% | 0.59% | 0.59% |
| 12 | Pure Storage Inc | 0.58% | 0.58% | 0.58% |
Only in IVOO
8 total- Lumentum Holdings Inc 1.44%
- Coherent Corp 1.18%
- EchoStar Corp 0.45%
- Kemper Corp 0.05%
- ASGN Inc 0.05%
- ZoomInfo Technologies Inc 0.05%
- Fifth Third Bancorp 0.00%
- SM Energy Co 0.00%
Only in SPMD
7 total- Solstice Advanced Materials Inc 0.38%
- Moog Inc 0.26%
- CareTrust REIT Inc 0.26%
- InterDigital Inc 0.24%
- SiTime Corp 0.24%
- Vicor Corp 0.11%
- State Street Global Advisors 0.03%
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 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.