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
393 positions appear in both funds. Buying equal dollars of IVOO and SPMD would leave roughly 90.8% 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
IVOO is 8 bps cheaper than SPMD. On a $100,000 position that's about $80/yr more in fees for SPMD.
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
393 shared in total| # | Holding | In IVOO | In SPMD | Overlap |
|---|---|---|---|---|
| 1 | Twilio Inc | 1.00% | 0.86% | 0.86% |
| 2 | ATI Inc | 0.78% | 0.74% | 0.74% |
| 3 | Illumina Inc | 0.91% | 0.73% | 0.73% |
| 4 | TechnipFMC PLC | 0.87% | 0.73% | 0.73% |
| 5 | Everpure Inc | 0.82% | 0.68% | 0.68% |
| 6 | nVent Electric PLC | 0.68% | 0.76% | 0.68% |
| 7 | Carpenter Technology Corp | 0.66% | 0.84% | 0.66% |
| 8 | XPO Inc | 0.64% | 0.66% | 0.64% |
| 9 | Okta Inc | 0.81% | 0.63% | 0.63% |
| 10 | US Foods Holding Corp | 0.65% | 0.62% | 0.62% |
| 11 | United Therapeutics Corp | 0.61% | 0.63% | 0.61% |
| 12 | Curtiss-Wright Corp | 0.60% | 0.77% | 0.60% |
Only in IVOO
7 total- Toast Inc 0.45%
- Sun Communities Inc 0.39%
- Allison Transmission Holdings Inc 0.29%
- Molina Healthcare Inc 0.29%
- Krystal Biotech Inc 0.26%
- BrightSpring Health Services Inc 0.26%
- IES Holdings Inc 0.15%
Only in SPMD
7 total- Webster Financial Corp 0.34%
- TopBuild Corp 0.27%
- Chart Industries Inc 0.26%
- Taylor Morrison Home Corp 0.18%
- Janus Henderson Group PLC 0.18%
- National Storage Affiliates Trust 0.09%
- Goodyear Tire & Rubber Co/The 0.05%
Related comparisons
More comparisons with IVOO
- IVOO vs IJH · iShares Core S&P Mid-Cap ETF 90.8%
- IVOO vs IJK · iShares S&P Mid-Cap 400 Growth ETF 62.7%
- IVOO vs IJJ · iShares S&P Mid-Cap 400 Value ETF 60.9%
- IVOO vs BBMC · JPMorgan BetaBuilders U.S. Mid Cap Equity ETF 58.6%
- IVOO vs SCHM · Schwab U.S. Mid-Cap ETF 54.2%
- IVOO vs VB · Vanguard Morningstar Small-Cap ETF 43.8%
More comparisons with SPMD
- SPMD vs MDY · State Street SPDR S&P MIDCAP 400 ETF Trust 81.5%
- SPMD vs IJK · iShares S&P Mid-Cap 400 Growth ETF 65.5%
- SPMD vs IJJ · iShares S&P Mid-Cap 400 Value ETF 62.3%
- SPMD vs BBMC · JPMorgan BetaBuilders U.S. Mid Cap Equity ETF 57.9%
- SPMD vs SCHM · Schwab U.S. Mid-Cap ETF 53.8%
- SPMD vs VB · Vanguard Morningstar Small-Cap ETF 43.5%
Percentages are holdings overlap with the named fund.
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.