MDYvsIVOOETF Comparison
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The ETFs State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) and Vanguard S&P Mid-Cap 400 ETF (IVOO) track the S&P MidCap 400 Total Return Index - USD and 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 IVOO. MDY is up 15.04% year-to-date (YTD) with -$1.03B in YTD flows. IVOO performs better with 15.31% YTD performance, and +$363M in YTD flows. Run a side-by-side ETF comparison of MDY and IVOO 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 IVOO 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 IVOO | -0.05%+0.02% | +4.16%+4.29% | +15.04%+15.31% | +19.87%+20.26% | +44.79%+45.91% | +50.63%+52.16% |
| Flows | MDY IVOO | -$618M+$110M | -$483M+$199M | -$1.03B+$363M | -$785M+$532M | -$988M+$1.23B | -$2.24B+$1.45B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | MDY IVOO | +14.91%+14.57% | +15.66%+15.59% | +17.79%+17.78% | +19.76%+19.50% |
| Max drawdown | MDY IVOO | -4.24%-4.26% | -8.78%-8.82% | -23.91%-24.02% | -23.91%-24.02% |
| Max drawdown duration | MDY IVOO | 26d26d | 53d53d | 379d379d | 379d379d |
Trading data
MDY | IVOO | |
Last sale 7/24/2026 at 1:30 PM | $690.71 | $128.21 |
| Previous close 07/23/2026 | $687.93 | $127.64 |
| 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 | IVOO | |
|---|---|---|
| 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 | IVOO | |
|---|---|---|
| Last price | $690.71 | $128.21 |
| 1D performance | +0.40% | +0.45% |
| AuM | $26.58 B | $3.81 B |
| E/R | 0.23% | 0.07% |
Characteristics
MDY | IVOO | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | State Street Investment Management | Vanguard |
| Benchmark | S&P MidCap 400 Index | S&P MidCap 400 Index |
| N° of holdings | 400 | 402 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | May 4, 1995 | September 7, 2010 |
| ESG | No | No |
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Exposure
Countries
MDY
USA
95.41%
Other
4.59%
IVOO
USA
95.68%
Other
4.32%
Sectors
MDY
Finance
21.51%
Industrials
18.53%
Technology
15.28%
Non-Energy Materi.
10.61%
Healthcare
8.49%
Other
25.58%
IVOO
Finance
21.82%
Industrials
18.67%
Technology
15.25%
Non-Energy Materi.
10.59%
Healthcare
8.48%
Other
25.19%
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Diversification
MDY
Total weight of top 15 holdings out of 15
11.09%
IVOO
Total weight of top 15 holdings out of 15
11.07%
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%
IVOO
Twilio, Inc.
0.86%
Carpenter Technology Corp.
0.84%
MKS, Inc.
0.82%
Curtiss-Wright Corp.
0.76%
Entegris, Inc.
0.75%
nVent Electric Plc
0.75%
ATI, Inc.
0.73%
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%
Frequently asked questions about MDY and IVOO
How have the MDY and IVOO ETFs performed in 2026?
As of July 24, 2026, MDY is up 15.04% year-to-date (YTD), while IVOO has returned 15.31%. That puts IVOO better performer ahead so far this year.
Which ETF is attracting more investor money: MDY or IVOO?
Year-to-date, the MDY ETF saw -$1.03B in flows, compared to +$363M for IVOO.
Which ETF is more volatile: MDY or IVOO?
Over the past year, MDY had a volatility of 15.66%, while IVOO experienced 15.59%.
Which ETF is bigger: MDY or IVOO?
As of July 24, 2026, MDY holds $26.58 B in assets under management (AUM), while IVOO manages $3.81 B.
What sectors do the MDY and IVOO ETFs invest in?
MDY leans toward sectors like Finance, Industrials and Technology. Meanwhile, IVOO focuses on Finance, Industrials and Technology.
What are the top holdings of the MDY ETF and IVOO ETF?
MDY top holdings include Twilio, Inc., Carpenter Technology Corp. and MKS, Inc.. IVOO holds in its top three: Twilio, Inc., Carpenter Technology Corp. and MKS, Inc..
Which ETF is more diversified: MDY or IVOO?
MDY holds 400 securities with 11.09% of its assets in the top 15. IVOO has 402 securities and a top 15 weight of 11.07%.
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