ETF comparison
BBMC vs SPY
US Mid Cap vs US Large Cap.
JPMorgan BetaBuilders U.S. Mid Cap Equity ETF · State Street SPDR S&P 500 ETF Trust
Holdings overlap
69 positions appear in both funds. Buying equal dollars of BBMC and SPY would leave roughly 1.4% 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
BBMC is 2 bps cheaper than SPY. On a $100,000 position that's about $24/yr more in fees for SPY.
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 SPY.
Top shared holdings
69 shared in total| # | Holding | In BBMC | In SPY | Overlap |
|---|---|---|---|---|
| 1 | Moderna, Inc. | 0.42% | 0.11% | 0.11% |
| 2 | Qnity Electronics, Inc. | 0.59% | 0.04% | 0.04% |
| 3 | Williams-Sonoma, Inc. | 0.58% | 0.04% | 0.04% |
| 4 | Tapestry, Inc. | 0.66% | 0.04% | 0.04% |
| 5 | Casey's General Stores, Inc. | 0.70% | 0.03% | 0.03% |
| 6 | Reddit, Inc. | 0.43% | 0.03% | 0.03% |
| 7 | Viatris, Inc. | 0.43% | 0.03% | 0.03% |
| 8 | CH Robinson Worldwide, Inc. | 0.36% | 0.03% | 0.03% |
| 9 | Zebra Technologies Corp. | 0.31% | 0.03% | 0.03% |
| 10 | Nordson Corp. | 0.32% | 0.03% | 0.03% |
| 11 | CF Industries Holdings, Inc. | 0.41% | 0.03% | 0.03% |
| 12 | Best Buy Co., Inc. | 0.36% | 0.03% | 0.03% |
Only in BBMC
393 total- Natera, Inc. 0.79%
- Revolution Medicines, Inc. 0.75%
- TechnipFMC plc 0.58%
- Curtiss-Wright Corp. 0.58%
- Carpenter Technology Corp. 0.55%
- ATI, Inc. 0.54%
- nVent Electric plc 0.53%
- Okta, Inc. 0.52%
- XPO, Inc. 0.51%
- US Foods Holding Corp. 0.48%
Only in SPY
436 total- NVIDIA CORP 8.50%
- APPLE INC 7.32%
- MICROSOFT CORP 5.77%
- AMAZON.COM INC 3.71%
- ALPHABET INC CL A 3.03%
- BROADCOM INC 2.54%
- ALPHABET INC CL C 2.43%
- META PLATFORMS INC CLASS A 2.41%
- MICRON TECHNOLOGY INC 1.82%
- TESLA INC 1.57%
Related comparisons
More comparisons with BBMC
- BBMC vs VO · Vanguard Morningstar Mid-Cap ETF 1.1%
- BBMC vs VUG · Vanguard Morningstar Growth ETF 0.3%
- BBMC vs VTV · Vanguard Morningstar Value ETF 0.1%
- BBMC vs QQQ · Invesco QQQ Trust 0.0%
- BBMC vs SCHM · Schwab U.S. Mid-Cap ETF 69.6%
- BBMC vs SPMD · State Street SPDR Portfolio S&P 400 Mid Cap ETF 57.9%
More comparisons with SPY
- SPY vs SMLF · iShares U.S. Small-Cap Equity Factor ETF 1.0%
- SPY vs DON · WisdomTree U.S. MidCap Dividend Fund 1.0%
- SPY vs DFAS · U.S. Small Cap Portfolio-ETF Class Shares 0.9%
- SPY vs VBK · Vanguard Morningstar Small-Cap Growth ETF 0.8%
- SPY vs DFAT · U.S. Targeted Value Portfolio-ETF Class Shares 0.7%
- SPY vs SCHA · Schwab U.S. Small-Cap ETF 0.5%
Percentages are holdings overlap with the named fund.
Open BBMC or SPY 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.