MDYvsBBMCETF Comparison
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State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) and JPMorgan BetaBuilders U.S. Mid Cap Equity ETF (BBMC) belong to the same industry segment: US Mid Cap. Both ETFs have the same top 3 sector exposures: Finance, Industrials and Technology. MDY is more expensive with a Total Expense Ratio (TER) of 0.23%, versus 0.07% for BBMC. MDY is up 15.04% year-to-date (YTD) with -$1.03B in YTD flows. BBMC performs better with 16.94% YTD performance, and -$74M in YTD flows. Run a side-by-side ETF comparison of MDY and BBMC below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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MDY vs BBMC performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 07/24/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | MDY BBMC | -0.05%-0.62% | +4.16%+5.40% | +15.04%+16.94% | +19.87%+25.24% | +44.79%+58.20% | +50.63%+49.89% |
| Flows | MDY BBMC | -$618M-$51M | -$483M-$98M | -$1.03B-$74M | -$785M-$310M | -$988M-$433M | -$2.24B-$214M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | MDY BBMC | +14.91%+16.18% | +15.66%+16.66% | +17.79%+18.73% | +19.76%+20.69% |
| Max drawdown | MDY BBMC | -4.24%-4.14% | -8.78%-9.60% | -23.91%-24.17% | -23.91%-30.03% |
| Max drawdown duration | MDY BBMC | 26d16d | 53d46d | 379d275d | 379d1045d |
Trading data
MDY | BBMC | |
Last sale 7/24/2026 at 1:30 PM | $690.71 | |
| Previous close 07/23/2026 | $687.93 | |
| Consolidated volume 07/23/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of June 30, 2026
1-year trailing difference
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MDY | BBMC | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 7/24/2026 at 1:30 PM
Live
Closed
MDY | BBMC | |
|---|---|---|
| Last price | $690.71 | – |
| 1D performance | +0.40% | – |
| AuM | $26.58 B | $2.03 B |
| E/R | 0.23% | 0.07% |
Characteristics
MDY | BBMC | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | State Street Investment Management | J.P. Morgan Asset Management |
| Benchmark | S&P MidCap 400 Index | Morningstar US Mid Cap Target Market Exposure Extended Index |
| N° of holdings | 400 | 460 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | May 4, 1995 | April 14, 2020 |
| ESG | No | No |
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Exposure
Countries
MDY
USA
95.41%
Other
4.59%
BBMC
USA
95.76%
Other
4.24%
Sectors
MDY
Finance
21.51%
Industrials
18.53%
Technology
15.28%
Non-Energy Materi.
10.61%
Healthcare
8.49%
Other
25.58%
BBMC
Finance
19.71%
Industrials
18.76%
Technology
13.85%
Healthcare
12.37%
Non-Energy Materi.
10.46%
Consumer Cyclical.
7.17%
Other
17.69%
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Diversification
MDY
Total weight of top 15 holdings out of 15
11.09%
BBMC
Total weight of top 15 holdings out of 15
9.31%
Top 15 holdings
Data as of June 30, 2026
MDY
Twilio, Inc.
0.86%
Carpenter Technology Corp.
0.84%
MKS, Inc.
0.82%
Curtiss-Wright Corp.
0.77%
nVent Electric Plc
0.75%
Entegris, Inc.
0.75%
ATI, Inc.
0.74%
Illumina, Inc.
0.73%
TechnipFMC plc
0.72%
Sterling Infrastructure, Inc.
0.70%
MasTec, Inc.
0.70%
Woodward, Inc.
0.69%
MACOM Technology Solutions Holdings, Inc.
0.68%
Everpure, Inc.
0.68%
XPO, Inc.
0.66%
BBMC
Natera, Inc.
0.76%
Qnity Electronics, Inc.
0.75%
Revolution Medicines, Inc.
0.70%
Carpenter Technology Corp.
0.63%
Tapestry, Inc.
0.63%
Casey's General Stores, Inc.
0.62%
Curtiss-Wright Corp.
0.60%
Williams-Sonoma, Inc.
0.60%
nVent Electric Plc
0.59%
MKS, Inc.
0.59%
MACOM Technology Solutions Holdings, Inc.
0.58%
Sterling Infrastructure, Inc.
0.57%
ATI, Inc.
0.57%
FTAI Aviation Ltd.
0.56%
Woodward, Inc.
0.55%
Frequently asked questions about MDY and BBMC
How have the MDY and BBMC ETFs performed in 2026?
As of July 24, 2026, MDY is up 15.04% year-to-date (YTD), while BBMC has returned 16.94%. That puts BBMC better performer ahead so far this year.
Which ETF is attracting more investor money: MDY or BBMC?
Year-to-date, the MDY ETF saw -$1.03B in flows, compared to -$74M for BBMC.
Which ETF is more volatile: MDY or BBMC?
Over the past year, MDY had a volatility of 15.66%, while BBMC experienced 16.66%.
Which ETF is bigger: MDY or BBMC?
As of July 24, 2026, MDY holds $26.58 B in assets under management (AUM), while BBMC manages $2.03 B.
What sectors do the MDY and BBMC ETFs invest in?
MDY leans toward sectors like Finance, Industrials and Technology. Meanwhile, BBMC focuses on Finance, Industrials and Technology.
What are the top holdings of the MDY ETF and BBMC ETF?
MDY top holdings include Twilio, Inc., Carpenter Technology Corp. and MKS, Inc.. BBMC holds in its top three: Natera, Inc., Qnity Electronics, Inc. and Revolution Medicines, Inc..
Which ETF is more diversified: MDY or BBMC?
MDY holds 400 securities with 11.09% of its assets in the top 15. BBMC has 466 securities and a top 15 weight of 9.31%.
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