VOvsMDYETF Comparison
VS
Vanguard Mid-Cap ETF (VO) and State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) belong to the same industry segment: US Mid Cap. Both ETFs have the same top 3 sector exposures: Industrials, Information Technology and Financials. VO is less expensive with a Total Expense Ratio (TER) of 0.03%, versus 0.23% for MDY. VO is up 11.82% year-to-date (YTD) with +$6.33B in YTD flows. MDY performs better with 15.67% YTD performance, and -$501M in YTD flows. Run a side-by-side ETF comparison of VO and MDY 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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VO vs MDY performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 06/15/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | VO MDY | +5.58%+5.58% | +11.17%+13.38% | +11.82%+15.67% | +19.90%+26.58% | +55.41%+52.34% | +47.90%+48.92% |
| Flows | VO MDY | +$3.09B+$47M | +$4.35B+$83M | +$6.33B-$501M | +$10.88B-$420M | +$21.50B-$554M | +$32.44B-$2.12B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | VO MDY | +14.56%+17.98% | +12.74%+15.86% | +14.79%+17.88% | +17.63%+19.91% |
| Max drawdown | VO MDY | -3.96%-4.24% | -8.12%-8.78% | -18.93%-23.91% | -27.54%-23.91% |
| Max drawdown duration | VO MDY | 21d26d | 49d53d | 211d379d | 972d379d |
Trading data
VO | MDY | |
Last sale 6/16/2026 at 1:30 PM | $80.65 | $694.32 |
| Previous close 06/15/2026 | $80.81 | $696.41 |
| Consolidated volume 06/15/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of May 29, 2026
1-year trailing difference
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VO | MDY | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 6/16/2026 at 1:30 PM
Live
Closed
VO | MDY | |
|---|---|---|
| Last price | $80.65 | $694.32 |
| 1D performance | -0.20% | -0.30% |
| AuM | $107.70 B | $27.33 B |
| E/R | 0.03% | 0.23% |
Characteristics
VO | MDY | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | Vanguard | State Street Investment Management |
| Benchmark | CRSP U.S. Mid Cap Index | S&P MidCap 400 Index |
| N° of holdings | 269 | 381 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | January 26, 2004 | May 4, 1995 |
| ESG | No | No |
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Exposure
Countries
VO
USA
92.33%
Other
7.67%
MDY
USA
92.53%
Other
7.47%
Sectors
VO
Industrials
17.2%
Information Techn.
16.44%
Financials
11.97%
Consumer Discreti.
10.1%
Energy
8.35%
Utilities
8.32%
Other
27.62%
MDY
Industrials
22.12%
Information Techn.
14.67%
Financials
13.09%
Consumer Discreti.
10.5%
Health Care
8.3%
Other
31.31%
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Diversification
VO
Total weight of top 15 holdings out of 15
14.32%
MDY
Total weight of top 15 holdings out of 15
10.57%
Top 15 holdings
Data as of April 30, 2026
VO
WESTERN DIGITAL
1.49%
SEAGATE TECHNOLOGY HOLDINGS PLC
1.48%
VERTIV HOLDINGS
1.25%
QUANTA SERVICES
1.10%
HOWMET AEROSPACE INC
0.98%
CONSTELLATION ENERGY CORP
0.97%
CUMMINS
0.94%
SCHLUMBERGER
0.86%
CRH PLC
0.80%
VALERO ENERGY
0.76%
MONOLITHIC POWER SYSTEMS
0.75%
ROSS STORES
0.74%
MARATHON PETROLEUM
0.74%
MOTOROLA SOLUTIONS
0.73%
MARVELL TECHNOLOGY
0.73%
MDY
FLEX LTD
0.98%
TECHNIPFMC PLC
0.89%
CURTISS WRIGHT
0.77%
XPO LOGISTICS
0.75%
UTD THERAPEUT
0.71%
FABRINET
0.71%
MICHAEL STORES
0.70%
NVENT ELECTRIC PLC
0.67%
TWILIO
0.65%
PURE STORAGE
0.65%
WOODWARD
0.63%
ENTEGRIS
0.62%
CARPENTER TECHNOLOGY
0.62%
ATI INC
0.61%
US FOODS HOLDING CORP
0.60%
Frequently asked questions about VO and MDY
How have the VO and MDY ETFs performed in 2026?
As of June 15, 2026, VO is up 11.82% year-to-date (YTD), while MDY has returned 15.67%. That puts MDY better performer ahead so far this year.
Which ETF is attracting more investor money: VO or MDY?
Year-to-date, the VO ETF saw +$6.33B in flows, compared to -$501M for MDY.
Which ETF is more volatile: VO or MDY?
Over the past year, VO had a volatility of 12.74%, while MDY experienced 15.86%.
Which ETF is bigger: VO or MDY?
As of June 15, 2026, VO holds $107.70 B in assets under management (AUM), while MDY manages $27.33 B.
What sectors do the VO and MDY ETFs invest in?
VO leans toward sectors like Industrials, Information Technology and Financials. Meanwhile, MDY focuses on Industrials, Information Technology and Financials.
What are the top holdings of the VO ETF and MDY ETF?
VO top holdings include WESTERN DIGITAL, SEAGATE TECHNOLOGY HOLDINGS PLC and VERTIV HOLDINGS. MDY holds in its top three: FLEX LTD, TECHNIPFMC PLC and CURTISS WRIGHT.
Which ETF is more diversified: VO or MDY?
VO holds 289 securities with 14.32% of its assets in the top 15. MDY has 400 securities and a top 15 weight of 10.57%.
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