ETF comparison
IJH vs MDY
Both US Mid Cap.
iShares Core S&P Mid-Cap ETF · State Street SPDR S&P MIDCAP 400 ETF Trust
Holdings overlap
371 positions appear in both funds. Buying equal dollars of IJH and MDY would leave roughly 81.4% 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
IJH is 18 bps cheaper than MDY. On a $100,000 position that's about $180/yr more in fees for MDY.
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 IJH vs MDY.
Top shared holdings
371 shared in total| # | Holding | In IJH | In MDY | Overlap |
|---|---|---|---|---|
| 1 | ATI INC | 0.74% | 0.70% | 0.70% |
| 2 | UNITED THERAPEUTICS CORP | 0.63% | 0.75% | 0.63% |
| 3 | XPO INC | 0.66% | 0.63% | 0.63% |
| 4 | ENTEGRIS INC | 0.75% | 0.63% | 0.63% |
| 5 | US FOODS HOLDING CORP | 0.62% | 0.68% | 0.62% |
| 6 | WOODWARD INC | 0.70% | 0.55% | 0.55% |
| 7 | TD SYNNEX CORP | 0.55% | 0.53% | 0.53% |
| 8 | RELIANCE INC | 0.52% | 0.65% | 0.52% |
| 9 | RB GLOBAL INC | 0.60% | 0.50% | 0.50% |
| 10 | ROKU INC | 0.50% | 0.62% | 0.50% |
| 11 | EAST WEST BANCORP INC | 0.49% | 0.53% | 0.49% |
| 12 | ITT INC | 0.49% | 0.51% | 0.49% |
Only in IJH
29 total- TWILIO INC 0.86%
- NVENT ELECTRIC PLC 0.75%
- ILLUMINA INC 0.73%
- TECHNIPFMC PLC 0.73%
- EVERPURE INC 0.68%
- OKTA INC 0.63%
- FABRINET 0.55%
- ROIVANT SCIENCES LTD 0.44%
- JAZZ PHARMACEUTICALS PLC 0.42%
- RENAISSANCERE HOLDINGS LTD 0.37%
Only in MDY
30 total- U.S. Dollar 0.77%
- TechnipFMC plc 0.72%
- Roivant Sciences Ltd. 0.59%
- nVent Electric plc 0.52%
- SharkNinja Inc. 0.52%
- Toast Inc. Class A 0.52%
- Jazz Pharmaceuticals Public Limited Company 0.44%
- Sun Communities Inc. 0.42%
- RenaissanceRe Holdings Ltd. 0.42%
- Glaukos Corp 0.41%
Related comparisons
More comparisons with IJH
- IJH vs IJK · iShares S&P Mid-Cap 400 Growth ETF 65.5%
- IJH vs IJJ · iShares S&P Mid-Cap 400 Value ETF 62.3%
- IJH vs BBMC · JPMorgan BetaBuilders U.S. Mid Cap Equity ETF 57.9%
- IJH vs SCHM · Schwab U.S. Mid-Cap ETF 53.8%
- IJH vs VBK · Vanguard Morningstar Small-Cap Growth ETF 45.2%
- IJH vs VB · Vanguard Morningstar Small-Cap ETF 43.5%
More comparisons with MDY
- MDY vs IJJ · iShares S&P Mid-Cap 400 Value ETF 58.9%
- MDY vs BBMC · JPMorgan BetaBuilders U.S. Mid Cap Equity ETF 54.8%
- MDY vs IJK · iShares S&P Mid-Cap 400 Growth ETF 54.4%
- MDY vs SCHM · Schwab U.S. Mid-Cap ETF 51.0%
- MDY vs VB · Vanguard Morningstar Small-Cap ETF 43.1%
- MDY vs AVMV · Avantis U.S. Mid Cap Value ETF 24.8%
Percentages are holdings overlap with the named fund.
Open IJH or MDY 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.