RWK vs. SPSM

Last updated Jun 24, 2026

RWK (Invesco S&P MidCap 400 Revenue ETF) and SPSM (State Street SPDR Portfolio S&P 600 Small Cap ETF) are both Small Cap Blend Equities funds - RWK tracks the S&P MidCap 400 Revenue-Weighted Index while SPSM tracks the S&P SmallCap 600 Index. Both are passively managed. Over the past 10 years, RWK returned 13.12%/yr vs 11.47%/yr for SPSM. Their correlation of 0.92 suggests significant overlap in exposure. RWK charges 0.39%/yr vs 0.03%/yr for SPSM.

Performance

RWK vs. SPSM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco S&P MidCap 400 Revenue ETF (RWK) and State Street SPDR Portfolio S&P 600 Small Cap ETF (SPSM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RWK achieves a 13.93% return, which is significantly lower than SPSM's 19.33% return. Over the past 10 years, RWK has outperformed SPSM with an annualized return of 13.12%, while SPSM has yielded a comparatively lower 11.47% annualized return.

RWK

• 1D: -0.34%
• 1M: 3.57%
• YTD: 13.93%
• 6M: 12.02%
• 1Y: 26.41%
• 3Y*: 17.49%
• 5Y*: 11.36%
• 10Y*: 13.12%

SPSM

• 1D: -0.34%
• 1M: 4.27%
• YTD: 19.33%
• 6M: 16.91%
• 1Y: 34.61%
• 3Y*: 16.26%
• 5Y*: 6.36%
• 10Y*: 11.47%

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

RWK vs. SPSM - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RWK Invesco S&P MidCap 400 Revenue ETF	13.93%	10.27%	11.94%	23.76%	-8.19%	34.31%	11.06%	28.20%	-14.65%	13.39%
SPSM State Street SPDR Portfolio S&P 600 Small Cap ETF	19.33%	6.11%	8.55%	16.11%	-16.12%	26.67%	11.69%	25.85%	-11.17%	15.44%

Correlation

The correlation between RWK and SPSM is 0.92, 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	0.92
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	0.94
Correlation (All Time) Calculated using the full available price history since Jul 9, 2013	0.92

The correlation between RWK and SPSM has been stable across timeframes, ranging from 0.92 to 0.94 - a consistent structural relationship.

RWK vs. SPSM - Sectors Allocation Comparison

Sectors	RWK	SPSM
Industrials	22.1%	15.2%
Consumer Cyclical	20.4%	13.1%
Technology	16.1%	17.1%
Financial Services	12.1%	16.5%
Consumer Defensive	10.4%	3.6%
Energy	5.0%	5.4%
Basic Materials	4.9%	5.0%
Healthcare	4.2%	11.0%
Real Estate	2.6%	7.6%
Utilities	1.6%	1.9%
Communication Services	0.7%	3.7%

Return for Risk

RWK vs. SPSM — Risk / Return Rank

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

RWK

RWK Risk / Return Rank: 48
RWK Sharpe Ratio Rank: 48
RWK Sortino Ratio Rank: 51
RWK Omega Ratio Rank: 44
RWK Calmar Ratio Rank: 51
RWK Martin Ratio Rank: 48

SPSM

SPSM Risk / Return Rank: 67
SPSM Sharpe Ratio Rank: 62
SPSM Sortino Ratio Rank: 64
SPSM Omega Ratio Rank: 57
SPSM Calmar Ratio Rank: 79
SPSM 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. SPSM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco S&P MidCap 400 Revenue ETF (RWK) and State Street SPDR Portfolio S&P 600 Small Cap ETF (SPSM). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	RWK	SPSM	Difference
Sharpe ratio: Return per unit of total volatility	1.58	1.97	-0.39
Sortino ratio: Return per unit of downside risk	2.39	2.85	-0.46
Omega ratio: Gain probability vs. loss probability	1.28	1.34	-0.06
Calmar ratio: Return relative to maximum drawdown	2.38	3.99	-1.60
Martin ratio: Return relative to average drawdown	7.64	13.45	-5.81

RWK vs. SPSM - Sharpe Ratio Comparison

The current RWK Sharpe Ratio is 1.58, which is comparable to the SPSM Sharpe Ratio of 1.97. The chart below compares the historical Sharpe Ratios of RWK and SPSM, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

RWK vs. SPSM - Drawdown Comparison

The maximum RWK drawdown since its inception was -56.49%, which is greater than SPSM's maximum drawdown of -42.89%. Use the drawdown chart below to compare losses from any high point for RWK and SPSM.

Drawdown Indicators

	RWK	SPSM	Difference
Max Drawdown Largest peak-to-trough decline	-56.49%	-42.89%	-13.60%
Max Drawdown (1Y) Largest decline over 1 year	-11.14%	-8.72%	-2.42%
Max Drawdown (3Y) Largest decline over 3 years	-24.58%	-27.94%	+3.36%
Max Drawdown (5Y) Largest decline over 5 years	-24.58%	-27.94%	+3.36%
Max Drawdown (10Y) Largest decline over 10 years	-46.20%	-42.89%	-3.31%
Current Drawdown Current decline from peak	-1.79%	-0.41%	-1.38%
Average Drawdown Average peak-to-trough decline	-7.53%	-7.89%	+0.36%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.46%	2.58%	+0.88%

Volatility

RWK vs. SPSM - Volatility Comparison

The current volatility for Invesco S&P MidCap 400 Revenue ETF (RWK) is 4.36%, while State Street SPDR Portfolio S&P 600 Small Cap ETF (SPSM) has a volatility of 4.93%. This indicates that RWK experiences smaller price fluctuations and is considered to be less risky than SPSM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RWK	SPSM	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.36%	4.93%	-0.57%
Volatility (6M) Calculated over the trailing 6-month period	12.12%	12.04%	+0.08%
Volatility (1Y) Calculated over the trailing 1-year period	16.82%	17.65%	-0.83%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.09%	21.42%	-0.33%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.93%	22.99%	-0.06%

RWK vs. SPSM - Expense Ratio Comparison

RWK has a 0.39% expense ratio, which is higher than SPSM's 0.03% expense ratio.

Dividends

RWK vs. SPSM - Dividend Comparison

RWK's dividend yield for the trailing twelve months is around 1.04%, less than SPSM's 1.41% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RWK Invesco S&P MidCap 400 Revenue ETF	1.04%	1.25%	1.11%	1.05%	1.18%	0.85%	0.96%	1.09%	1.22%	0.99%	1.30%	0.92%
SPSM State Street SPDR Portfolio S&P 600 Small Cap ETF	1.41%	1.62%	1.85%	1.61%	1.38%	1.40%	1.34%	1.58%	1.82%	1.51%	1.49%	2.37%

Frequently Asked Questions

Can I hold both RWK and SPSM in my portfolio?

With a correlation of 0.92, RWK and SPSM 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 SPSM?

SPSM has higher volatility (4.93%) compared to RWK (4.36%). In terms of maximum drawdown, RWK dropped -56.49% vs SPSM's -42.89%.

Which ETF is better, RWK or SPSM?

On 10-year performance, RWK leads with 13.12% vs 11.47% for SPSM. On fees, SPSM is cheaper at 0.03% per year. On volatility, RWK has been the lower-risk option at 4.36%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, RWK or SPSM?

Over the 10-year period, RWK has performed better with a 13.12% return vs 11.47%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, RWK or SPSM?

SPSM is cheaper with a 0.03% expense ratio, compared with 0.39% for RWK.

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

SPSM has the higher dividend yield at 1.41%, compared with 1.04% for RWK.

What is the main difference between RWK and SPSM?

RWK tracks S&P MidCap 400 Revenue-Weighted Index, while SPSM tracks S&P SmallCap 600 Index. They also come from different issuers: Invesco and State Street. Their fees differ too: 0.39% for RWK and 0.03% for SPSM.

Which has better risk-adjusted returns?

SPSM currently has the higher Sharpe Ratio (1.97 vs 1.58), 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.