RFGvsMDYGETF Comparison
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Invesco S&P MidCap 400® Pure Growth ETF (RFG) and State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) belong to the same industry segment: US Mid Cap Growth. RFG's top 3 sector exposures are Healthcare, Industrials and Technology. In contrast, MDYG's top sector exposures are Industrials, Technology and Healthcare. RFG is more expensive with a Total Expense Ratio (TER) of 0.35%, versus 0.15% for MDYG. RFG is up 13.56% year-to-date (YTD) with +$11M in YTD flows. MDYG performs better with 15.38% YTD performance, and +$4M in YTD flows. Run a side-by-side ETF comparison of RFG 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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RFG vs MDYG performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/10/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | RFG MDYG | -5.42%-4.97% | -2.63%-2.30% | +13.56%+15.38% | +17.37%+15.11% | +50.03%+53.20% | +34.46%+42.48% |
| Flows | RFG MDYG | -$21K+$22M | +$4M+$53M | +$11M+$4M | -$6M+$295K | -$33M+$7M | -$114M+$357M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | RFG MDYG | +20.36%+15.47% | +20.02%+17.68% | +20.67%+18.94% | +23.02%+20.77% |
| Max drawdown | RFG MDYG | -9.92%-7.22% | -10.42%-9.91% | -26.58%-25.46% | -35.14%-29.25% |
| Max drawdown duration | RFG MDYG | 53d25d | 45d45d | 380d379d | 836d834d |
Trading data
RFG | MDYG | |
Last sale 9/11/2026 at 1:30 PM | $60.10 | $106.42 |
| Previous close 09/10/2026 | $59.54 | $105.50 |
| Consolidated volume 09/10/2026 | ||
| 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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RFG | 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 9/11/2026 at 1:30 PM
Live
Closed
RFG | MDYG | |
|---|---|---|
| Last price | $60.10 | $106.42 |
| 1D performance | +0.94% | +0.87% |
| AuM | $338.08 M | $2.81 B |
| E/R | 0.35% | 0.15% |
Characteristics
RFG | MDYG | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | Invesco | State Street Investment Management |
| Benchmark | S&P MidCap 400 Pure Growth Index | S&P MidCap 400 Growth Index |
| N° of holdings | 100 | 245 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | March 1, 2006 | November 8, 2005 |
| ESG | No | No |
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Exposure
Countries
RFG
USA
94.35%
Other
5.65%
MDYG
USA
94.73%
Other
5.27%
Sectors
RFG
Healthcare
23.75%
Industrials
20.35%
Technology
17.66%
Non-Energy Materi.
8.36%
Finance
7.88%
Other
21.99%
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
RFG
Total weight of top 15 holdings out of 15
28.16%
MDYG
Total weight of top 15 holdings out of 15
19.58%
Top 15 holdings
Data as of July 31, 2026
RFG
Arrowhead Pharmaceuticals, Inc.
2.63%
Carpenter Technology Corp.
2.36%
TechnipFMC plc
2.24%
Halozyme Therapeutics, Inc.
2.16%
Woodward, Inc.
2.02%
Sterling Infrastructure, Inc.
1.97%
Medpace Holdings, Inc.
1.87%
DigitalOcean Holdings, Inc.
1.77%
ATI, Inc.
1.68%
Valaris Ltd.
1.63%
Five Below, Inc.
1.62%
MasTec, Inc.
1.62%
Twilio, Inc.
1.54%
InterDigital, Inc.
1.53%
Krystal Biotech, Inc.
1.51%
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 RFG and MDYG
How have the RFG and MDYG ETFs performed in 2026?
As of September 10, 2026, RFG is up 13.56% year-to-date (YTD), while MDYG has returned 15.38%. That puts MDYG better performer ahead so far this year.
Which ETF is attracting more investor money: RFG or MDYG?
Year-to-date, the RFG ETF saw +$11M in flows, compared to +$4M for MDYG.
Which ETF is more volatile: RFG or MDYG?
Over the past year, RFG had a volatility of 20.02%, while MDYG experienced 17.68%.
Which ETF is bigger: RFG or MDYG?
As of September 10, 2026, RFG holds $338.08 M in assets under management (AUM), while MDYG manages $2.81 B.
What sectors do the RFG and MDYG ETFs invest in?
RFG leans toward sectors like Healthcare, Industrials and Technology. Meanwhile, MDYG focuses on Industrials, Technology and Healthcare.
What are the top holdings of the RFG ETF and MDYG ETF?
RFG top holdings include Arrowhead Pharmaceuticals, Inc., Carpenter Technology Corp. and TechnipFMC plc. MDYG holds in its top three: Twilio, Inc., TechnipFMC plc and Curtiss-Wright Corp..
Which ETF is more diversified: RFG or MDYG?
RFG holds 100 securities with 28.16% of its assets in the top 15. MDYG has 245 securities and a top 15 weight of 19.58%.
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