ETF comparison
ITOT vs MDY
US Total Market vs US Mid Cap.
iShares Core S&P Total U.S. Stock Market ETF · State Street SPDR S&P MIDCAP 400 ETF Trust
Holdings overlap
385 positions appear in both funds. Buying equal dollars of ITOT and MDY would leave roughly 4.8% 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
ITOT is 20 bps cheaper than MDY. On a $100,000 position that's about $200/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 ITOT vs MDY.
Top shared holdings
385 shared in total| # | Holding | In ITOT | In MDY | Overlap |
|---|---|---|---|---|
| 1 | Twilio, Inc. | 0.04% | 1.30% | 0.04% |
| 2 | Carpenter Technology Corp. | 0.04% | 0.55% | 0.04% |
| 3 | MKS, Inc. | 0.04% | 0.54% | 0.04% |
| 4 | Curtiss-Wright Corp. | 0.04% | 0.58% | 0.04% |
| 5 | Entegris, Inc. | 0.04% | 0.73% | 0.04% |
| 6 | ATI, Inc. | 0.04% | 0.75% | 0.04% |
| 7 | MasTec, Inc. | 0.04% | 0.39% | 0.04% |
| 8 | Sterling Infrastructure, Inc. | 0.04% | 0.47% | 0.04% |
| 9 | Woodward, Inc. | 0.03% | 0.56% | 0.03% |
| 10 | MACOM Technology Solutions Holdings, Inc. | 0.03% | 0.64% | 0.03% |
| 11 | XPO, Inc. | 0.03% | 0.62% | 0.03% |
| 12 | United Therapeutics Corp. | 0.03% | 0.67% | 0.03% |
Only in ITOT
2,113 total- NVIDIA Corp. 6.63%
- Apple, Inc. 5.81%
- Microsoft Corp. 3.79%
- Amazon.com, Inc. 3.19%
- Alphabet, Inc. 2.86%
- Broadcom, Inc. 2.45%
- Alphabet, Inc. 2.29%
- Micron Technology, Inc. 1.78%
- Meta Platforms, Inc. 1.69%
- Tesla, Inc. 1.62%
Only in MDY
16 total- U.S. Dollar 0.89%
- nVent Electric plc 0.79%
- TechnipFMC plc 0.77%
- Roivant Sciences Ltd. 0.55%
- Fabrinet 0.48%
- Jazz Pharmaceuticals Public Limited Company 0.44%
- SharkNinja Inc. 0.44%
- RenaissanceRe Holdings Ltd. 0.39%
- CNH Industrial NV 0.33%
- Axalta Coating Systems Ltd. 0.20%
Related comparisons
More comparisons with ITOT
- ITOT vs VFLO · Victoryshares Free Cash Flow ETF 4.7%
- ITOT vs DFAT · U.S. Targeted Value Portfolio-ETF Class Shares 4.3%
- ITOT vs IWM · iShares Russell 2000 ETF 4.2%
- ITOT vs SPHD · Invesco S&P 500 High Dividend Low Volatility ETF 4.2%
- ITOT vs BBSC · JPMorgan BetaBuilders U.S. Small Cap Equity ETF 3.7%
- ITOT vs DON · WisdomTree U.S. MidCap Dividend Fund 3.7%
More comparisons with MDY
- MDY vs SCHB · Schwab U.S. Broad Market ETF 4.6%
- MDY vs VYM · Vanguard High Dividend Yield Index Fund ETF Shares 4.4%
- MDY vs DGRO · iShares Core Dividend Growth ETF 4.0%
- MDY vs SCHD · Schwab U.S. Dividend Equity ETF 3.4%
- MDY vs VIG · Vanguard Dividend Appreciation Index Fund ETF Shares 3.1%
- MDY vs IWF · iShares Russell 1000 Growth ETF 2.2%
Percentages are holdings overlap with the named fund.
Open ITOT 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.