RWK vs. IWS

Last updated Jun 3, 2026

RWK (Invesco S&P MidCap 400 Revenue ETF) and IWS (iShares Russell Mid-Cap Value ETF) are both exchange-traded funds - RWK is a Small Cap Blend Equities fund tracking the S&P MidCap 400 Revenue-Weighted Index, while IWS is a Mid Cap Value Equities fund tracking the Russell Midcap Value Index. Both are passively managed. Over the past 10 years, RWK returned 12.83%/yr vs 10.24%/yr for IWS. Their correlation of 0.91 suggests significant overlap in exposure. RWK charges 0.39%/yr vs 0.23%/yr for IWS.

Performance

RWK vs. IWS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco S&P MidCap 400 Revenue ETF (RWK) and iShares Russell Mid-Cap Value ETF (IWS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RWK achieves a 13.73% return, which is significantly lower than IWS's 15.10% return. Over the past 10 years, RWK has outperformed IWS with an annualized return of 12.83%, while IWS has yielded a comparatively lower 10.24% annualized return.

RWK

• 1D: 1.10%
• 1M: 3.22%
• YTD: 13.73%
• 6M: 14.17%
• 1Y: 30.18%
• 3Y*: 18.14%
• 5Y*: 10.78%
• 10Y*: 12.83%

IWS

• 1D: 0.94%
• 1M: 3.50%
• YTD: 15.10%
• 6M: 16.20%
• 1Y: 28.24%
• 3Y*: 17.41%
• 5Y*: 8.46%
• 10Y*: 10.24%

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

RWK vs. IWS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RWK Invesco S&P MidCap 400 Revenue ETF	13.73%	10.27%	11.94%	23.76%	-8.19%	34.31%	11.06%	28.20%	-14.65%	13.39%
IWS iShares Russell Mid-Cap Value ETF	15.10%	10.82%	12.91%	12.52%	-12.29%	28.10%	4.83%	26.73%	-12.43%	13.14%

Correlation

The correlation between RWK and IWS is 0.93, 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	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since Feb 25, 2008	0.91

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

RWK vs. IWS - Sectors Allocation Comparison

Sectors	RWK	IWS
Industrials	21.8%	16.7%
Consumer Cyclical	20.7%	8.4%
Technology	14.0%	16.5%
Financial Services	13.1%	14.1%
Consumer Defensive	11.3%	4.8%
Energy	5.3%	8.1%
Basic Materials	4.7%	5.4%
Healthcare	4.0%	7.3%
Real Estate	2.8%	8.6%
Utilities	1.6%	7.0%
Communication Services	0.7%	3.1%

Return for Risk

RWK vs. IWS — Risk / Return Rank

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

RWK

RWK Risk / Return Rank: 52
RWK Sharpe Ratio Rank: 52
RWK Sortino Ratio Rank: 56
RWK Omega Ratio Rank: 50
RWK Calmar Ratio Rank: 52
RWK Martin Ratio Rank: 49

IWS

IWS Risk / Return Rank: 67
IWS Sharpe Ratio Rank: 63
IWS Sortino Ratio Rank: 66
IWS Omega Ratio Rank: 61
IWS Calmar Ratio Rank: 73
IWS Martin Ratio Rank: 74

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.

RWK vs. IWS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco S&P MidCap 400 Revenue ETF (RWK) and iShares Russell Mid-Cap Value ETF (IWS). 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.

	RWK	IWS	Difference
Sharpe ratio Return per unit of total volatility	1.82	2.15	-0.34
Sortino ratio Return per unit of downside risk	2.70	3.06	-0.36
Omega ratio Gain probability vs. loss probability	1.31	1.37	-0.06
Calmar ratio Return relative to maximum drawdown	2.62	3.76	-1.13
Martin ratio Return relative to average drawdown	8.44	14.20	-5.76
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RWK vs. IWS - Sharpe Ratio Comparison

The current RWK Sharpe Ratio is 1.82, which is comparable to the IWS Sharpe Ratio of 2.15. The chart below compares the historical Sharpe Ratios of RWK and IWS, 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

	RWK	IWS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.82	2.15	-0.34
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.51	0.49	+0.02
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.56	0.53	+0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.48	0.42	+0.06

Drawdowns

RWK vs. IWS - Drawdown Comparison

The maximum RWK drawdown since its inception was -56.49%, smaller than the maximum IWS drawdown of -62.40%. Use the drawdown chart below to compare losses from any high point for RWK and IWS.

Drawdown Indicators

	RWK	IWS	Difference
Max Drawdown Largest peak-to-trough decline	-56.49%	-62.40%	+5.91%
Max Drawdown (1Y) Largest decline over 1 year	-11.14%	-7.53%	-3.61%
Max Drawdown (3Y) Largest decline over 3 years	-24.58%	-20.57%	-4.01%
Max Drawdown (5Y) Largest decline over 5 years	-24.58%	-21.23%	-3.35%
Max Drawdown (10Y) Largest decline over 10 years	-46.20%	-43.83%	-2.37%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-7.56%	-8.02%	+0.46%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.46%	1.99%	+1.47%

Volatility

RWK vs. IWS - Volatility Comparison

Invesco S&P MidCap 400 Revenue ETF (RWK) has a higher volatility of 4.93% compared to iShares Russell Mid-Cap Value ETF (IWS) at 3.42%. This indicates that RWK's price experiences larger fluctuations and is considered to be riskier than IWS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RWK	IWS	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.93%	3.42%	+1.51%
Volatility (6M) Calculated over the trailing 6-month period	11.87%	9.59%	+2.28%
Volatility (1Y) Calculated over the trailing 1-year period	16.72%	13.19%	+3.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.13%	17.30%	+3.83%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.96%	19.36%	+3.60%

RWK vs. IWS - Expense Ratio Comparison

RWK has a 0.39% expense ratio, which is higher than IWS's 0.23% expense ratio.

Dividends

RWK vs. IWS - Dividend Comparison

RWK's dividend yield for the trailing twelve months is around 1.12%, less than IWS's 1.34% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IWS iShares Russell Mid-Cap Value ETF	1.34%	1.53%	1.50%	1.76%	1.93%	1.39%	1.87%	1.97%	2.53%	1.96%	2.10%	2.14%
RWK Invesco S&P MidCap 400 Revenue ETF	1.12%	1.25%	1.11%	1.05%	1.18%	0.85%	0.96%	1.09%	1.22%	0.99%	1.30%	0.92%

Frequently Asked Questions

Can I hold both RWK and IWS in my portfolio?

With a correlation of 0.93, RWK and IWS 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, RWK or IWS?

RWK has higher volatility (4.93%) compared to IWS (3.42%). In terms of maximum drawdown, RWK dropped -56.49% vs IWS's -62.40%.

Which ETF is better, RWK or IWS?

On 10-year performance, RWK leads with 12.83% vs 10.24% for IWS. On fees, IWS is cheaper at 0.23% per year. On volatility, IWS has been the lower-risk option at 3.42%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, RWK or IWS?

Over the 10-year period, RWK has performed better with a 12.83% return vs 10.24%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, RWK or IWS?

IWS is cheaper with a 0.23% expense ratio, compared with 0.39% for RWK.

Which ETF pays a higher dividend yield, RWK or IWS?

IWS has the higher dividend yield at 1.34%, compared with 1.12% for RWK.

What is the main difference between RWK and IWS?

RWK is categorized as Small Cap Blend Equities, while IWS is Mid Cap Value Equities. RWK tracks S&P MidCap 400 Revenue-Weighted Index, while IWS tracks Russell Midcap Value Index. They also come from different issuers: Invesco and iShares. Their fees differ too: 0.39% for RWK and 0.23% for IWS.

Which has better risk-adjusted returns?

IWS currently has the higher Sharpe Ratio (2.15 vs 1.82), 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.