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 93.8% 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
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 | 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 Ltd 1.58%
- Masimo Corp 0.23%
- Concentrix Corp 0.04%
- Blackbaud Inc 0.03%
- BellRing Brands Inc 0.03%
- Coty Inc 0.02%
Only in SPMD
6 total- Roku Inc 0.50%
- Coeur Mining Inc 0.46%
- Semtech Corp 0.41%
- Sanmina Corp 0.37%
- Viavi Solutions Inc 0.31%
- Sirius XM Holdings Inc 0.15%
Related comparisons
More comparisons with IVOO
- IVOO vs IJH · iShares Core S&P Mid-Cap ETF 93.8%
- IVOO vs MDY · State Street SPDR S&P MIDCAP 400 ETF Trust 87.1%
- IVOO vs IJK · iShares S&P Mid-Cap 400 Growth ETF 63.3%
- IVOO vs IJJ · iShares S&P Mid-Cap 400 Value ETF 61.6%
- IVOO vs BBMC · JPMorgan BetaBuilders U.S. Mid Cap Equity ETF 56.7%
- IVOO vs SCHM · Schwab U.S. Mid-Cap ETF 54.6%
More comparisons with SPMD
- SPMD vs MDY · State Street SPDR S&P MIDCAP 400 ETF Trust 84.4%
- 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 54.2%
- 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.