VIOG vs. RFG

Last updated Jun 4, 2026

VIOG (Vanguard S&P Small-Cap 600 Growth ETF) and RFG (Invesco S&P MidCap 400® Pure Growth ETF) are both Small Cap Growth Equities funds - VIOG tracks the S&P SmallCap 600 Growth Index while RFG tracks the S&P Mid Cap 400 Pure Growth. Both are passively managed. Over the past 10 years, VIOG returned 10.83%/yr vs 10.49%/yr for RFG. Their correlation of 0.88 suggests significant overlap in exposure. VIOG charges 0.15%/yr vs 0.35%/yr for RFG.

Performance

VIOG vs. RFG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard S&P Small-Cap 600 Growth ETF (VIOG) and Invesco S&P MidCap 400® Pure Growth ETF (RFG). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VIOG achieves a 15.37% return, which is significantly lower than RFG's 22.14% return. Both investments have delivered pretty close results over the past 10 years, with VIOG having a 10.83% annualized return and RFG not far behind at 10.49%.

VIOG

• 1D: -0.65%
• 1M: 0.86%
• YTD: 15.37%
• 6M: 13.49%
• 1Y: 26.34%
• 3Y*: 14.40%
• 5Y*: 5.47%
• 10Y*: 10.83%

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%

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

VIOG vs. RFG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VIOG Vanguard S&P Small-Cap 600 Growth ETF	15.37%	5.40%	9.23%	16.92%	-21.14%	22.49%	19.68%	21.16%	-4.57%	14.70%
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%

Correlation

The correlation between VIOG and RFG is 0.86, 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	0.86
Correlation (3Y) Calculated over the trailing 3-year period	0.89
Correlation (5Y) Calculated over the trailing 5-year period	0.91
Correlation (10Y) Calculated over the trailing 10-year period	0.90
Correlation (All Time) Calculated using the full available price history since Sep 10, 2010	0.88

The correlation between VIOG and RFG has been stable across timeframes, ranging from 0.86 to 0.91 - a consistent structural relationship.

VIOG vs. RFG - Sectors Allocation Comparison

Sectors	VIOG	RFG
Technology	19.7%	21.2%
Industrials	19.5%	31.3%
Healthcare	14.6%	19.4%
Financial Services	13.7%	3.7%
Consumer Cyclical	10.9%	7.6%
Real Estate	6.6%	2.2%
Energy	4.1%	5.4%
Consumer Defensive	3.3%	3.1%
Basic Materials	3.1%	3.3%
Communication Services	2.7%	0.6%
Utilities	1.7%	2.4%

Return for Risk

VIOG vs. RFG — Risk / Return Rank

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

VIOG

VIOG Risk / Return Rank: 49
VIOG Sharpe Ratio Rank: 42
VIOG Sortino Ratio Rank: 45
VIOG Omega Ratio Rank: 40
VIOG Calmar Ratio Rank: 58
VIOG Martin Ratio Rank: 57

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

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.

VIOG vs. RFG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard S&P Small-Cap 600 Growth ETF (VIOG) and Invesco S&P MidCap 400® Pure Growth ETF (RFG). 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.

	VIOG	RFG	Difference
Sharpe ratio: Return per unit of total volatility	1.52	1.79	-0.27
Sortino ratio: Return per unit of downside risk	2.27	2.55	-0.29
Omega ratio: Gain probability vs. loss probability	1.27	1.31	-0.04
Calmar ratio: Return relative to maximum drawdown	2.93	3.18	-0.25
Martin ratio: Return relative to average drawdown	10.01	12.89	-2.89
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VIOG vs. RFG - Sharpe Ratio Comparison

The current VIOG Sharpe Ratio is 1.52, which is comparable to the RFG Sharpe Ratio of 1.79. The chart below compares the historical Sharpe Ratios of VIOG and RFG, 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

	VIOG	RFG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.52	1.79	-0.27
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.26	0.38	-0.12
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.48	0.46	+0.02
Sharpe Ratio (All Time) Calculated using the full available price history	0.60	0.43	+0.17

Drawdowns

VIOG vs. RFG - Drawdown Comparison

The maximum VIOG drawdown since its inception was -41.73%, smaller than the maximum RFG drawdown of -51.93%. Use the drawdown chart below to compare losses from any high point for VIOG and RFG.

Drawdown Indicators

	VIOG	RFG	Difference
Max Drawdown Largest peak-to-trough decline	-41.73%	-51.93%	+10.20%
Max Drawdown (1Y) Largest decline over 1 year	-9.03%	-10.41%	+1.38%
Max Drawdown (3Y) Largest decline over 3 years	-27.35%	-26.71%	-0.64%
Max Drawdown (5Y) Largest decline over 5 years	-29.15%	-35.16%	+6.01%
Max Drawdown (10Y) Largest decline over 10 years	-41.73%	-42.92%	+1.19%
Current Drawdown Current decline from peak	-1.47%	0.00%	-1.47%
Average Drawdown Average peak-to-trough decline	-7.62%	-8.97%	+1.35%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.64%	2.56%	+0.08%

Volatility

VIOG vs. RFG - Volatility Comparison

The current volatility for Vanguard S&P Small-Cap 600 Growth ETF (VIOG) is 4.61%, while Invesco S&P MidCap 400® Pure Growth ETF (RFG) has a volatility of 6.50%. This indicates that VIOG experiences smaller price fluctuations and is considered to be less risky than RFG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VIOG	RFG	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.61%	6.50%	-1.89%
Volatility (6M) Calculated over the trailing 6-month period	12.44%	14.72%	-2.28%
Volatility (1Y) Calculated over the trailing 1-year period	17.48%	18.53%	-1.05%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.47%	22.81%	-1.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.84%	23.05%	-0.21%

VIOG vs. RFG - Expense Ratio Comparison

VIOG has a 0.15% expense ratio, which is lower than RFG's 0.35% expense ratio.

Dividends

VIOG vs. RFG - Dividend Comparison

VIOG's dividend yield for the trailing twelve months is around 0.84%, more than RFG's 0.31% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
VIOG Vanguard S&P Small-Cap 600 Growth ETF	0.84%	1.04%	1.03%	1.15%	1.17%	0.69%	0.68%	1.09%	0.76%	0.87%	0.92%	1.04%

Frequently Asked Questions

Can I hold both VIOG and RFG in my portfolio?

VIOG and RFG have a correlation of 0.86, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VIOG or RFG?

RFG has higher volatility (6.50%) compared to VIOG (4.61%). In terms of maximum drawdown, VIOG dropped -41.73% vs RFG's -51.93%.

Which ETF is better, VIOG or RFG?

On 10-year performance, VIOG leads with 10.83% vs 10.49% for RFG. On fees, VIOG is cheaper at 0.15% per year. On volatility, VIOG has been the lower-risk option at 4.61%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, VIOG or RFG?

Over the 10-year period, VIOG has performed better with a 10.83% return vs 10.49%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, VIOG or RFG?

VIOG is cheaper with a 0.15% expense ratio, compared with 0.35% for RFG.

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

VIOG has the higher dividend yield at 0.84%, compared with 0.31% for RFG.

What is the main difference between VIOG and RFG?

VIOG tracks S&P SmallCap 600 Growth Index, while RFG tracks S&P Mid Cap 400 Pure Growth. They also come from different issuers: Vanguard and Invesco. Their fees differ too: 0.15% for VIOG and 0.35% for RFG.

Which has better risk-adjusted returns?

RFG currently has the higher Sharpe Ratio (1.79 vs 1.52), 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.