RFG vs. MDY

Last updated Jun 4, 2026

RFG (Invesco S&P MidCap 400® Pure Growth ETF) and MDY (SPDR S&P MidCap 400 ETF) are both Small Cap Growth Equities funds - RFG tracks the S&P Mid Cap 400 Pure Growth while MDY tracks the S&P MidCap 400 Index. Both are passively managed. Over the past 10 years, RFG returned 10.49%/yr vs 11.04%/yr for MDY. Their correlation of 0.91 suggests significant overlap in exposure. RFG charges 0.35%/yr vs 0.23%/yr for MDY.

Performance

RFG vs. MDY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco S&P MidCap 400® Pure Growth ETF (RFG) and SPDR S&P MidCap 400 ETF (MDY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RFG achieves a 22.14% return, which is significantly higher than MDY's 13.91% return. Over the past 10 years, RFG has underperformed MDY with an annualized return of 10.49%, while MDY has yielded a comparatively higher 11.04% annualized return.

RFG

• 1D: 0.61%
• 1M: 7.30%
• YTD: 22.14%
• 6M: 21.89%
• 1Y: 32.96%
• 3Y*: 20.57%
• 5Y*: 8.63%
• 10Y*: 10.49%

MDY

• 1D: -0.09%
• 1M: 3.81%
• YTD: 13.91%
• 6M: 14.15%
• 1Y: 25.00%
• 3Y*: 15.77%
• 5Y*: 7.92%
• 10Y*: 11.04%

*Multi-year figures are annualized to reflect compound growth (CAGR)

RFG vs. MDY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RFG Invesco S&P MidCap 400® Pure Growth ETF	22.14%	8.80%	17.80%	16.42%	-21.70%	13.81%	32.86%	17.09%	-13.98%	20.46%
MDY SPDR S&P MidCap 400 ETF	13.91%	7.19%	13.64%	16.07%	-13.28%	24.53%	13.50%	25.78%	-11.29%	15.93%

Correlation

The correlation between RFG and MDY is 0.91, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since Mar 8, 2006	0.91

The correlation between RFG and MDY has been stable across timeframes, ranging from 0.91 to 0.94 - a consistent structural relationship.

RFG vs. MDY - Sectors Allocation Comparison

Sectors	RFG	MDY
Industrials	31.3%	25.1%
Technology	21.2%	15.4%
Healthcare	19.4%	8.7%
Consumer Cyclical	7.6%	10.8%
Energy	5.4%	5.6%
Financial Services	3.7%	13.9%
Basic Materials	3.3%	4.8%
Consumer Defensive	3.1%	3.8%
Utilities	2.4%	3.1%
Real Estate	2.2%	7.7%
Communication Services	0.6%	1.0%

Return for Risk

RFG vs. MDY — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

RFG

RFG Risk / Return Rank: 57
RFG Sharpe Ratio Rank: 52
RFG Sortino Ratio Rank: 52
RFG Omega Ratio Rank: 49
RFG Calmar Ratio Rank: 65
RFG Martin Ratio Rank: 69

MDY

MDY Risk / Return Rank: 50
MDY Sharpe Ratio Rank: 46
MDY Sortino Ratio Rank: 46
MDY Omega Ratio Rank: 44
MDY Calmar Ratio Rank: 56
MDY Martin Ratio Rank: 58

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

RFG vs. MDY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco S&P MidCap 400® Pure Growth ETF (RFG) and SPDR S&P MidCap 400 ETF (MDY). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	RFG	MDY	Difference
Sharpe ratio Return per unit of total volatility	1.79	1.63	+0.16
Sortino ratio Return per unit of downside risk	2.55	2.39	+0.17
Omega ratio Gain probability vs. loss probability	1.31	1.29	+0.02
Calmar ratio Return relative to maximum drawdown	3.18	2.85	+0.33
Martin ratio Return relative to average drawdown	12.89	10.38	+2.52
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RFG vs. MDY - Sharpe Ratio Comparison

The current RFG Sharpe Ratio is 1.79, which is comparable to the MDY Sharpe Ratio of 1.63. The chart below compares the historical Sharpe Ratios of RFG and MDY, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	RFG	MDY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.79	1.63	+0.16
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.38	0.40	-0.02
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.46	0.52	-0.07
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.53	-0.10

Drawdowns

RFG vs. MDY - Drawdown Comparison

The maximum RFG drawdown since its inception was -51.93%, smaller than the maximum MDY drawdown of -55.33%. Use the drawdown chart below to compare losses from any high point for RFG and MDY.

Drawdown Indicators

	RFG	MDY	Difference
Max Drawdown Largest peak-to-trough decline	-51.93%	-55.33%	+3.40%
Max Drawdown (1Y) Largest decline over 1 year	-10.41%	-8.82%	-1.59%
Max Drawdown (3Y) Largest decline over 3 years	-26.71%	-24.03%	-2.68%
Max Drawdown (5Y) Largest decline over 5 years	-35.16%	-24.03%	-11.13%
Max Drawdown (10Y) Largest decline over 10 years	-42.92%	-42.22%	-0.70%
Current Drawdown Current decline from peak	0.00%	-0.09%	+0.09%
Average Drawdown Average peak-to-trough decline	-8.97%	-7.03%	-1.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.56%	2.42%	+0.14%

Volatility

RFG vs. MDY - Volatility Comparison

Invesco S&P MidCap 400® Pure Growth ETF (RFG) has a higher volatility of 6.50% compared to SPDR S&P MidCap 400 ETF (MDY) at 4.33%. This indicates that RFG's price experiences larger fluctuations and is considered to be riskier than MDY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RFG	MDY	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.50%	4.33%	+2.17%
Volatility (6M) Calculated over the trailing 6-month period	14.72%	11.28%	+3.44%
Volatility (1Y) Calculated over the trailing 1-year period	18.53%	15.48%	+3.05%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.81%	19.77%	+3.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.05%	21.19%	+1.86%

RFG vs. MDY - Expense Ratio Comparison

RFG has a 0.35% expense ratio, which is higher than MDY's 0.23% expense ratio.

Dividends

RFG vs. MDY - Dividend Comparison

RFG's dividend yield for the trailing twelve months is around 0.31%, less than MDY's 1.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MDY SPDR S&P MidCap 400 ETF	1.04%	1.15%	1.18%	1.21%	1.37%	0.96%	1.12%	1.34%	1.39%	1.18%	1.31%	1.35%
RFG Invesco S&P MidCap 400® Pure Growth ETF	0.31%	0.43%	0.38%	0.99%	0.78%	0.05%	0.27%	0.64%	0.76%	0.66%	0.35%	0.61%

Frequently Asked Questions

Can I hold both RFG and MDY in my portfolio?

With a correlation of 0.91, RFG and MDY move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, RFG or MDY?

RFG has higher volatility (6.50%) compared to MDY (4.33%). In terms of maximum drawdown, RFG dropped -51.93% vs MDY's -55.33%.

Which ETF is better, RFG or MDY?

On 10-year performance, MDY leads with 11.04% vs 10.49% for RFG. On fees, MDY is cheaper at 0.23% per year. On volatility, MDY has been the lower-risk option at 4.33%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, RFG or MDY?

Over the 10-year period, MDY has performed better with a 11.04% return vs 10.49%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, RFG or MDY?

MDY is cheaper with a 0.23% expense ratio, compared with 0.35% for RFG.

Which ETF pays a higher dividend yield, RFG or MDY?

MDY has the higher dividend yield at 1.04%, compared with 0.31% for RFG.

What is the main difference between RFG and MDY?

RFG tracks S&P Mid Cap 400 Pure Growth, while MDY tracks S&P MidCap 400 Index. They also come from different issuers: Invesco and State Street. Their fees differ too: 0.35% for RFG and 0.23% for MDY.

Which has better risk-adjusted returns?

RFG currently has the higher Sharpe Ratio (1.79 vs 1.63), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.