IWM vs. RWM

Last updated Jun 4, 2026

IWM (iShares Russell 2000 ETF) and RWM (ProShares Short Russell2000) are both exchange-traded funds - IWM is a Small Cap Blend Equities fund tracking the Russell 2000 Index, while RWM is a Inverse Equities fund tracking the Russell 2000 (-100%). Both are passively managed. Over the past 10 years, IWM returned 10.93%/yr vs -11.85%/yr for RWM. At a correlation of -0.99, they often move in opposite directions. IWM charges 0.19%/yr vs 0.95%/yr for RWM.

Performance

IWM vs. RWM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Russell 2000 ETF (IWM) and ProShares Short Russell2000 (RWM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IWM achieves a 17.07% return, which is significantly higher than RWM's -13.83% return. Over the past 10 years, IWM has outperformed RWM with an annualized return of 10.93%, while RWM has yielded a comparatively lower -11.85% annualized return.

IWM

• 1D: -1.37%
• 1M: 3.52%
• YTD: 17.07%
• 6M: 15.83%
• 1Y: 39.10%
• 3Y*: 17.88%
• 5Y*: 6.11%
• 10Y*: 10.93%

RWM

• 1D: 1.37%
• 1M: -3.30%
• YTD: -13.83%
• 6M: -12.66%
• 1Y: -25.94%
• 3Y*: -12.10%
• 5Y*: -5.21%
• 10Y*: -11.85%

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

IWM vs. RWM - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IWM iShares Russell 2000 ETF	17.07%	12.66%	11.38%	16.83%	-20.48%	14.54%	20.03%	25.39%	-11.12%	14.58%
RWM ProShares Short Russell2000	-13.83%	-9.40%	-5.91%	-10.43%	18.34%	-17.90%	-31.04%	-19.83%	11.57%	-13.61%

Correlation

The correlation between IWM and RWM is -1.00, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-1.00
Correlation (3Y) Calculated over the trailing 3-year period	-1.00
Correlation (5Y) Calculated over the trailing 5-year period	-1.00
Correlation (10Y) Calculated over the trailing 10-year period	-1.00
Correlation (All Time) Calculated using the full available price history since Jan 26, 2007	-0.99

The correlation between IWM and RWM has been stable across timeframes, ranging from -1.00 to -0.99 - a consistent structural relationship.

IWM vs. RWM - Sectors Allocation Comparison

Sectors	IWM	RWM
Technology	19.5%	-
Industrials	17.1%	-
Financial Services	15.8%	80.6%
Healthcare	15.8%	-
Consumer Cyclical	7.8%	-
Energy	6.0%	-
Real Estate	5.7%	-
Basic Materials	4.5%	-
Utilities	3.0%	-
Consumer Defensive	2.1%	-
Communication Services	2.0%	-

Return for Risk

IWM vs. RWM — Risk / Return Rank

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

IWM

IWM Risk / Return Rank: 62
IWM Sharpe Ratio Rank: 59
IWM Sortino Ratio Rank: 59
IWM Omega Ratio Rank: 53
IWM Calmar Ratio Rank: 70
IWM Martin Ratio Rank: 67

RWM

RWM Risk / Return Rank: 1
RWM Sharpe Ratio Rank: 0
RWM Sortino Ratio Rank: 1
RWM Omega Ratio Rank: 1
RWM Calmar Ratio Rank: 1
RWM Martin Ratio Rank: 1

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.

IWM vs. RWM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Russell 2000 ETF (IWM) and ProShares Short Russell2000 (RWM). 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.

	IWM	RWM	Difference
Sharpe ratio Return per unit of total volatility	2.05	-1.37	+3.42
Sortino ratio Return per unit of downside risk	2.85	-1.95	+4.80
Omega ratio Gain probability vs. loss probability	1.34	0.79	+0.55
Calmar ratio Return relative to maximum drawdown	3.56	-0.95	+4.52
Martin ratio Return relative to average drawdown	12.64	-1.65	+14.29
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IWM vs. RWM - Sharpe Ratio Comparison

The current IWM Sharpe Ratio is 2.05, which is higher than the RWM Sharpe Ratio of -1.37. The chart below compares the historical Sharpe Ratios of IWM and RWM, 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

	IWM	RWM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.05	-1.37	+3.42
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.27	-0.23	+0.50
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.48	-0.51	+0.99
Sharpe Ratio (All Time) Calculated using the full available price history	0.37	-0.49	+0.85

Drawdowns

IWM vs. RWM - Drawdown Comparison

The maximum IWM drawdown since its inception was -59.05%, smaller than the maximum RWM drawdown of -95.47%. Use the drawdown chart below to compare losses from any high point for IWM and RWM.

Drawdown Indicators

	IWM	RWM	Difference
Max Drawdown Largest peak-to-trough decline	-59.05%	-95.47%	+36.42%
Max Drawdown (1Y) Largest decline over 1 year	-11.03%	-27.26%	+16.23%
Max Drawdown (3Y) Largest decline over 3 years	-27.50%	-41.38%	+13.88%
Max Drawdown (5Y) Largest decline over 5 years	-31.91%	-41.38%	+9.47%
Max Drawdown (10Y) Largest decline over 10 years	-41.13%	-73.72%	+32.59%
Current Drawdown Current decline from peak	-1.49%	-95.41%	+93.92%
Average Drawdown Average peak-to-trough decline	-10.77%	-74.04%	+63.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.10%	15.73%	-12.63%

Volatility

IWM vs. RWM - Volatility Comparison

iShares Russell 2000 ETF (IWM) and ProShares Short Russell2000 (RWM) have volatilities of 5.75% and 5.84%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IWM	RWM	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.75%	5.84%	-0.09%
Volatility (6M) Calculated over the trailing 6-month period	13.53%	13.52%	+0.01%
Volatility (1Y) Calculated over the trailing 1-year period	19.20%	19.07%	+0.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.52%	22.56%	-0.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.04%	23.11%	-0.07%

IWM vs. RWM - Expense Ratio Comparison

IWM has a 0.19% expense ratio, which is lower than RWM's 0.95% expense ratio.

Dividends

IWM vs. RWM - Dividend Comparison

IWM's dividend yield for the trailing twelve months is around 0.88%, less than RWM's 4.12% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IWM iShares Russell 2000 ETF	0.88%	1.04%	1.15%	1.35%	1.48%	0.94%	1.04%	1.26%	1.40%	1.26%	1.38%	1.54%
RWM ProShares Short Russell2000	4.12%	3.97%	6.03%	4.78%	0.39%	0.00%	0.20%	1.55%	0.87%	0.07%	0.00%	0.00%

Frequently Asked Questions

Can I hold both IWM and RWM in my portfolio?

IWM and RWM have a correlation of -1.00, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IWM or RWM?

RWM has higher volatility (5.84%) compared to IWM (5.75%). In terms of maximum drawdown, IWM dropped -59.05% vs RWM's -95.47%.

Which ETF is better, IWM or RWM?

On 10-year performance, IWM leads with 10.93% vs -11.85% for RWM. On fees, IWM is cheaper at 0.19% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, IWM or RWM?

Over the 10-year period, IWM has performed better with a 10.93% return vs -11.85%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, IWM or RWM?

IWM is cheaper with a 0.19% expense ratio, compared with 0.95% for RWM.

Which ETF pays a higher dividend yield, IWM or RWM?

RWM has the higher dividend yield at 4.12%, compared with 0.88% for IWM.

What is the main difference between IWM and RWM?

IWM is categorized as Small Cap Blend Equities, while RWM is Inverse Equities. IWM tracks Russell 2000 Index, while RWM tracks Russell 2000 (-100%). They also come from different issuers: iShares and ProShares. Their fees differ too: 0.19% for IWM and 0.95% for RWM.

Which has better risk-adjusted returns?

IWM currently has the higher Sharpe Ratio (2.05 vs -1.37), 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.