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, Technology and Industrials. In contrast, MDYG's top sector exposures are Technology, Industrials and Healthcare. RFG is more expensive with a Total Expense Ratio (TER) of 0.35%, versus 0.15% for MDYG. RFG is up 9.1% year-to-date (YTD) with +$3M in YTD flows. MDYG performs better with 12.48% YTD performance, and +$78M 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 10/27/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | RFG MDYG | -3.26%-1.12% | -5.88%-4.30% | +9.10%+12.48% | +8.63%+11.68% | +56.78%+63.77% | +26.52%+36.39% |
| Flows | RFG MDYG | -$4M+$68M | -$8M+$90M | +$3M+$78M | -$8M+$105M | -$39M+$64M | -$119M+$464M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | RFG MDYG | +19.59%+15.54% | +20.32%+17.57% | +20.72%+18.86% | +23.05%+20.77% |
| Max drawdown | RFG MDYG | -13.52%-10.14% | -13.52%-10.14% | -26.58%-25.46% | -35.14%-29.25% |
| Max drawdown duration | RFG MDYG | 71d71d | 71d71d | 380d379d | 836d834d |
Trading data
RFG | MDYG | |
Last sale 10/28/2026 at 1:30 PM | $57.66 | $104.01 |
| Previous close 10/27/2026 | $57.20 | $103.51 |
| Consolidated volume 10/27/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of September 30, 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 10/28/2026 at 1:30 PM
Live
Closed
RFG | MDYG | |
|---|---|---|
| Last price | $57.66 | $104.01 |
| 1D performance | +0.80% | +0.48% |
| AuM | $317.28 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 | 246 |
| 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
94.29%
Other
5.71%
MDYG
USA
94.92%
Other
5.08%
Sectors
RFG
Healthcare
22.98%
Technology
19.8%
Industrials
19.4%
Non-Energy Materi.
9.4%
Finance
7.8%
Other
20.62%
MDYG
Technology
20.4%
Industrials
19.16%
Healthcare
15.61%
Finance
14.67%
Non-Energy Materi.
9.85%
Other
20.3%
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Diversification
RFG
Total weight of top 15 holdings out of 15
29.09%
MDYG
Total weight of top 15 holdings out of 15
20.24%
Top 15 holdings
Data as of August 31, 2026
RFG
Halozyme Therapeutics, Inc.
2.60%
Arrowhead Pharmaceuticals, Inc.
2.54%
TechnipFMC plc
2.24%
Carpenter Technology Corp.
2.05%
ATI, Inc.
1.90%
DigitalOcean Holdings, Inc.
1.90%
Sterling Infrastructure, Inc.
1.90%
Twilio, Inc.
1.86%
InterDigital, Inc.
1.84%
Medpace Holdings, Inc.
1.84%
Five Below, Inc.
1.80%
Valaris Ltd.
1.76%
Woodward, Inc.
1.70%
Hecla Mining Co.
1.64%
FirstCash Holdings, Inc.
1.54%
MDYG
Twilio, Inc.
1.94%
TechnipFMC plc
1.69%
Everpure, Inc.
1.59%
Okta, Inc.
1.57%
ATI, Inc.
1.51%
nVent Electric Plc
1.32%
Carpenter Technology Corp.
1.28%
Tenet Healthcare Corp.
1.24%
XPO, Inc.
1.23%
United Therapeutics Corp.
1.17%
Curtiss-Wright Corp.
1.17%
Coeur Mining, Inc.
1.16%
Royal Gold, Inc.
1.15%
Roku, Inc.
1.12%
Woodward, Inc.
1.10%
Frequently asked questions about RFG and MDYG
How have the RFG and MDYG ETFs performed in 2026?
As of October 27, 2026, RFG is up 9.1% year-to-date (YTD), while MDYG has returned 12.48%. 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 +$3M in flows, compared to +$78M for MDYG.
Which ETF is more volatile: RFG or MDYG?
Over the past year, RFG had a volatility of 20.32%, while MDYG experienced 17.57%.
Which ETF is bigger: RFG or MDYG?
As of October 27, 2026, RFG holds $317.28 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, Technology and Industrials. Meanwhile, MDYG focuses on Technology, Industrials and Healthcare.
What are the top holdings of the RFG ETF and MDYG ETF?
RFG top holdings include Halozyme Therapeutics, Inc., Arrowhead Pharmaceuticals, Inc. and TechnipFMC plc. MDYG holds in its top three: Twilio, Inc., TechnipFMC plc and Everpure, Inc..
Which ETF is more diversified: RFG or MDYG?
RFG holds 100 securities with 29.09% of its assets in the top 15. MDYG has 246 securities and a top 15 weight of 20.24%.
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