ETF comparison
BBMC vs MDY
Both US Mid Cap.
JPMorgan BetaBuilders U.S. Mid Cap Equity ETF · State Street SPDR S&P MIDCAP 400 ETF Trust
Holdings overlap
258 positions appear in both funds. Buying equal dollars of BBMC and MDY would leave roughly 55.8% 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
BBMC is 16 bps cheaper than MDY. On a $100,000 position that's about $160/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 BBMC vs MDY.
Top shared holdings
258 shared in total| # | Holding | In BBMC | In MDY | Overlap |
|---|---|---|---|---|
| 1 | Curtiss-Wright Corp. | 0.58% | 0.58% | 0.58% |
| 2 | Carpenter Technology Corp. | 0.55% | 0.55% | 0.55% |
| 3 | ATI, Inc. | 0.54% | 0.75% | 0.54% |
| 4 | Okta, Inc. | 0.52% | 1.01% | 0.52% |
| 5 | XPO, Inc. | 0.51% | 0.62% | 0.51% |
| 6 | US Foods Holding Corp. | 0.48% | 0.60% | 0.48% |
| 7 | Tenet Healthcare Corp. | 0.47% | 0.60% | 0.47% |
| 8 | Woodward, Inc. | 0.46% | 0.56% | 0.46% |
| 9 | Reliance, Inc. | 0.45% | 0.59% | 0.45% |
| 10 | MKS, Inc. | 0.43% | 0.54% | 0.43% |
| 11 | TD SYNNEX Corp. | 0.42% | 0.64% | 0.42% |
| 12 | United Therapeutics Corp. | 0.42% | 0.67% | 0.42% |
Only in BBMC
204 total- Natera, Inc. 0.79%
- Revolution Medicines, Inc. 0.75%
- Casey's General Stores, Inc. 0.70%
- Tapestry, Inc. 0.66%
- Qnity Electronics, Inc. 0.59%
- TechnipFMC plc 0.58%
- Williams-Sonoma, Inc. 0.58%
- nVent Electric plc 0.53%
- Guardant Health, Inc. 0.45%
- Affirm Holdings, Inc. 0.44%
Only in MDY
143 total- Twilio Inc. Class A 1.30%
- U.S. Dollar 0.89%
- nVent Electric plc 0.79%
- TechnipFMC plc 0.77%
- Entegris Inc. 0.73%
- Roivant Sciences Ltd. 0.55%
- Semtech Corporation 0.52%
- Burlington Stores Inc. 0.50%
- East West Bancorp Inc. 0.50%
- Fabrinet 0.48%
Related comparisons
More comparisons with BBMC
- BBMC vs IJK · iShares S&P Mid-Cap 400 Growth ETF 38.3%
- BBMC vs IJJ · iShares S&P Mid-Cap 400 Value ETF 37.6%
- BBMC vs IWS · iShares Russell Mid-Cap Value ETF 31.6%
- BBMC vs IWR · iShares Russell Mid-Cap ETF 31.4%
- BBMC vs AVMV · Avantis U.S. Mid Cap Value ETF 28.0%
- BBMC vs IWP · iShares Russell Mid-Cap Growth ETF 23.6%
More comparisons with MDY
- MDY vs SCHM · Schwab U.S. Mid-Cap ETF 51.1%
- MDY vs VB · Vanguard Morningstar Small-Cap ETF 43.6%
- MDY vs AVMV · Avantis U.S. Mid Cap Value ETF 24.2%
- MDY vs IWS · iShares Russell Mid-Cap Value ETF 22.6%
- MDY vs IWR · iShares Russell Mid-Cap ETF 21.7%
- MDY vs IWP · iShares Russell Mid-Cap Growth ETF 17.3%
Percentages are holdings overlap with the named fund.
Open BBMC 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.