MDYGvsIVOOETF Comparison
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State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) belongs to the US Mid Cap Growth segment. Vanguard S&P Mid-Cap 400 ETF (IVOO) is part of the US Mid Cap segment. MDYG's top 3 sector exposures are Industrials, Technology and Healthcare. In contrast, IVOO's top sector exposures are Finance, Industrials and Technology. MDYG is more expensive with a Total Expense Ratio (TER) of 0.15%, versus 0.07% for IVOO. MDYG is up 19.23% year-to-date (YTD) with -$23M in YTD flows. IVOO performs worse with 17.28% YTD performance, and +$373M in YTD flows. Run a side-by-side ETF comparison of MDYG 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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MDYG vs IVOO performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 08/05/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | MDYG IVOO | -0.46%+0.84% | +4.41%+5.40% | +19.23%+17.28% | +24.94%+24.15% | +52.84%+48.65% | +47.19%+52.96% |
| Flows | MDYG IVOO | +$10M+$64M | +$25M+$192M | -$23M+$373M | -$23M+$536M | -$13M+$1.23B | +$341M+$1.45B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | MDYG IVOO | +18.32%+14.69% | +17.73%+15.65% | +18.92%+17.84% | +20.73%+19.52% |
| Max drawdown | MDYG IVOO | -6.04%-4.26% | -9.91%-8.82% | -25.46%-24.02% | -29.25%-24.02% |
| Max drawdown duration | MDYG IVOO | 36d26d | 45d53d | 379d379d | 834d379d |
Trading data
MDYG | IVOO | |
Last sale 8/6/2026 at 3:36 PM | $110.54 | $130.57 |
| Previous close 08/05/2026 | $109.89 | $130.28 |
| Consolidated volume 08/05/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of July 31, 2026
1-year trailing difference
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MDYG | 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 8/6/2026 at 3:36 PM
Live
Closed
MDYG | IVOO | |
|---|---|---|
| Last price | $110.54 | $130.57 |
| 1D performance | +0.59% | +0.22% |
| AuM | $2.88 B | $3.88 B |
| E/R | 0.15% | 0.07% |
Characteristics
MDYG | IVOO | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | State Street Investment Management | Vanguard |
| Benchmark | S&P MidCap 400 Growth Index | S&P MidCap 400 Index |
| N° of holdings | 244 | 402 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | November 8, 2005 | September 7, 2010 |
| ESG | No | No |
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Exposure
Countries
MDYG
USA
94.7%
Other
5.3%
IVOO
USA
95.68%
Other
4.32%
Sectors
MDYG
Industrials
22.33%
Technology
21.55%
Healthcare
13.25%
Finance
13.12%
Non-Energy Materi.
9.78%
Other
19.98%
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
MDYG
Total weight of top 15 holdings out of 15
20.48%
IVOO
Total weight of top 15 holdings out of 15
11.07%
Top 15 holdings
Data as of June 30, 2026
MDYG
Twilio, Inc.
1.65%
Carpenter Technology Corp.
1.61%
Curtiss-Wright Corp.
1.47%
nVent Electric Plc
1.44%
ATI, Inc.
1.42%
TechnipFMC plc
1.39%
Sterling Infrastructure, Inc.
1.36%
MasTec, Inc.
1.35%
Woodward, Inc.
1.33%
MACOM Technology Solutions Holdings, Inc.
1.31%
Everpure, Inc.
1.31%
XPO, Inc.
1.27%
United Therapeutics Corp.
1.21%
Okta, Inc.
1.21%
RB Global, Inc.
1.14%
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 MDYG and IVOO
How have the MDYG and IVOO ETFs performed in 2026?
As of August 5, 2026, MDYG is up 19.23% year-to-date (YTD), while IVOO has returned 17.28%. That puts MDYG better performer ahead so far this year.
Which ETF is attracting more investor money: MDYG or IVOO?
Year-to-date, the MDYG ETF saw -$23M in flows, compared to +$373M for IVOO.
Which ETF is more volatile: MDYG or IVOO?
Over the past year, MDYG had a volatility of 17.73%, while IVOO experienced 15.65%.
Which ETF is bigger: MDYG or IVOO?
As of August 5, 2026, MDYG holds $2.88 B in assets under management (AUM), while IVOO manages $3.88 B.
What sectors do the MDYG and IVOO ETFs invest in?
MDYG leans toward sectors like Industrials, Technology and Healthcare. Meanwhile, IVOO focuses on Finance, Industrials and Technology.
What are the top holdings of the MDYG ETF and IVOO ETF?
MDYG top holdings include Twilio, Inc., Carpenter Technology Corp. and Curtiss-Wright Corp.. IVOO holds in its top three: Twilio, Inc., Carpenter Technology Corp. and MKS, Inc..
Which ETF is more diversified: MDYG or IVOO?
MDYG holds 244 securities with 20.48% of its assets in the top 15. IVOO has 402 securities and a top 15 weight of 11.07%.
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