NUMGvsMDYGETF Comparison
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NuShares ESG Mid-Cap Growth ETF (NUMG) and State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) belong to the same industry segment: US Mid Cap Growth. NUMG's top 3 sector exposures are Technology, Industrials and Healthcare. In contrast, MDYG's top sector exposures are Industrials, Technology and Healthcare. NUMG is more expensive with a Total Expense Ratio (TER) of 0.31%, versus 0.15% for MDYG. NUMG is down -4.69% year-to-date (YTD) with -$38M in YTD flows. MDYG performs better with 13.86% YTD performance, and +$4M in YTD flows. Run a side-by-side ETF comparison of NUMG and MDYG 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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NUMG vs MDYG performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/18/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | NUMG MDYG | -5.61%-5.72% | +0.64%-4.85% | -4.69%+13.86% | -7.75%+13.67% | +21.46%+51.74% | -7.26%+43.42% |
| Flows | NUMG MDYG | +$1M+$17M | -$15M-$67M | -$38M+$4M | -$40M+$265K | -$96M+$21M | +$47M+$314M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | NUMG MDYG | +17.27%+15.24% | +19.28%+17.66% | +20.27%+18.94% | +23.24%+20.76% |
| Max drawdown | NUMG MDYG | -8.69%-8.24% | -19.58%-9.91% | -26.47%-25.46% | -38.67%-29.25% |
| Max drawdown duration | NUMG MDYG | 36d32d | 254d45d | 649d379d | 1767d834d |
Trading data
NUMG | MDYG | |
Last sale 9/21/2026 at 1:30 PM | $46.25 | $105.55 |
| Previous close 09/18/2026 | $45.54 | $104.94 |
| Consolidated volume 09/18/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of August 31, 2026
1-year trailing difference
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NUMG | MDYG | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/21/2026 at 1:30 PM
Live
Closed
NUMG | MDYG | |
|---|---|---|
| Last price | $46.25 | $105.55 |
| 1D performance | +1.56% | +0.58% |
| AuM | $345.93 M | $2.78 B |
| E/R | 0.31% | 0.15% |
Characteristics
NUMG | MDYG | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | Nuveen | State Street Investment Management |
| Benchmark | MSCI TIAA ESG USA Mid-Cap Growth Index | S&P MidCap 400 Growth Index |
| N° of holdings | 43 | 245 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | December 13, 2016 | November 8, 2005 |
| ESG | Yes | No |
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Exposure
Countries
NUMG
USA
98.41%
Other
1.59%
MDYG
USA
94.73%
Other
5.27%
Sectors
NUMG
Technology
24.02%
Industrials
20.18%
Healthcare
16.61%
Finance
12.47%
Consumer Non-Cycl.
8.12%
Consumer Cyclical.
7.97%
Other
10.64%
MDYG
Industrials
20.61%
Technology
19.17%
Healthcare
15.46%
Finance
14.43%
Non-Energy Materi.
9.26%
Other
21.06%
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Diversification
NUMG
Total weight of top 15 holdings out of 15
45.89%
MDYG
Total weight of top 15 holdings out of 15
19.58%
Top 15 holdings
Data as of July 31, 2026
NUMG
Datadog, Inc.
5.11%
Comfort Systems USA, Inc.
3.76%
Axon Enterprise, Inc.
3.37%
eBay, Inc.
3.30%
Lumentum Holdings, Inc.
3.17%
IDEXX Laboratories, Inc.
3.15%
Ciena Corp.
3.14%
Veeva Systems, Inc.
2.80%
EMCOR Group, Inc.
2.66%
Keysight Technologies, Inc.
2.66%
W.W. Grainger, Inc.
2.65%
Casey's General Stores, Inc.
2.63%
Burlington Stores, Inc.
2.56%
Live Nation Entertainment, Inc.
2.47%
ResMed, Inc.
2.47%
MDYG
Twilio, Inc.
1.65%
TechnipFMC plc
1.57%
Curtiss-Wright Corp.
1.47%
Carpenter Technology Corp.
1.42%
ATI, Inc.
1.41%
nVent Electric Plc
1.37%
Everpure, Inc.
1.34%
Okta, Inc.
1.31%
XPO, Inc.
1.30%
United Therapeutics Corp.
1.21%
Tenet Healthcare Corp.
1.20%
Woodward, Inc.
1.18%
RB Global, Inc.
1.12%
Roku, Inc.
1.04%
Sterling Infrastructure, Inc.
1.01%
Frequently asked questions about NUMG and MDYG
How have the NUMG and MDYG ETFs performed in 2026?
As of September 18, 2026, NUMG is down -4.69% year-to-date (YTD), while MDYG has returned 13.86%. That puts MDYG better performer ahead so far this year.
Which ETF is attracting more investor money: NUMG or MDYG?
Year-to-date, the NUMG ETF saw -$38M in flows, compared to +$4M for MDYG.
Which ETF is more volatile: NUMG or MDYG?
Over the past year, NUMG had a volatility of 19.28%, while MDYG experienced 17.66%.
Which ETF is bigger: NUMG or MDYG?
As of September 18, 2026, NUMG holds $345.93 M in assets under management (AUM), while MDYG manages $2.78 B.
What sectors do the NUMG and MDYG ETFs invest in?
NUMG leans toward sectors like Technology, Industrials and Healthcare. Meanwhile, MDYG focuses on Industrials, Technology and Healthcare.
What are the top holdings of the NUMG ETF and MDYG ETF?
NUMG top holdings include Datadog, Inc., Comfort Systems USA, Inc. and Axon Enterprise, Inc.. MDYG holds in its top three: Twilio, Inc., TechnipFMC plc and Curtiss-Wright Corp..
Which ETF is more diversified: NUMG or MDYG?
NUMG holds 43 securities with 45.89% of its assets in the top 15. MDYG has 245 securities and a top 15 weight of 19.58%.
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