IWMW vs. CWII

Last updated Jun 25, 2026

IWMW (iShares Russell 2000 BuyWrite ETF) and CWII (REX CRWV Growth & Income ETF) are both Derivative Income funds. IWMW is passively managed, while CWII is actively managed. At a 0.39 correlation, their price movements are largely independent. IWMW charges 0.39%/yr vs 1.03%/yr for CWII.

Performance

IWMW vs. CWII - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Russell 2000 BuyWrite ETF (IWMW) and REX CRWV Growth & Income ETF (CWII). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IWMW achieves a 12.03% return, which is significantly lower than CWII's 13,199.78% return.

IWMW

• 1D: 0.23%
• 1M: 4.49%
• YTD: 12.03%
• 6M: 10.74%
• 1Y: 24.97%
• 3Y*: —
• 5Y*: —
• 10Y*: —

CWII

• 1D: 0.00%
• 1M: 10,273.16%
• YTD: 13,199.78%
• 6M: 12,082.72%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

IWMW vs. CWII - Yearly Performance Comparison

	2026 (YTD)	2025
IWMW iShares Russell 2000 BuyWrite ETF	12.03%	-1.24%
CWII REX CRWV Growth & Income ETF	13,199.78%	-45.06%

Correlation

The correlation between IWMW and CWII is 0.39, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (All Time) Calculated using the full available price history since Nov 4, 2025	0.39

Return for Risk

IWMW vs. CWII — Risk / Return Rank

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

IWMW

IWMW Risk / Return Rank: 73
IWMW Sharpe Ratio Rank: 70
IWMW Sortino Ratio Rank: 67
IWMW Omega Ratio Rank: 77
IWMW Calmar Ratio Rank: 78
IWMW Martin Ratio Rank: 75

CWII

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

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.

IWMW vs. CWII - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Russell 2000 BuyWrite ETF (IWMW) and REX CRWV Growth & Income ETF (CWII). 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.

	IWMW	CWII	Difference
Sharpe ratio: Return per unit of total volatility	2.01	—	—
Sortino ratio: Return per unit of downside risk	2.74	—	—
Omega ratio: Gain probability vs. loss probability	1.40	—	—
Calmar ratio: Return relative to maximum drawdown	3.61	—	—
Martin ratio: Return relative to average drawdown	12.46	—	—

Drawdowns

IWMW vs. CWII - Drawdown Comparison

The maximum IWMW drawdown since its inception was -21.82%, smaller than the maximum CWII drawdown of -51.04%. Use the drawdown chart below to compare losses from any high point for IWMW and CWII.

Drawdown Indicators

	IWMW	CWII	Difference
Max Drawdown Largest peak-to-trough decline	-21.82%	-51.04%	+29.22%
Max Drawdown (1Y) Largest decline over 1 year	-6.94%	—	—
Current Drawdown Current decline from peak	-0.21%	0.00%	-0.21%
Average Drawdown Average peak-to-trough decline	-3.76%	-33.26%	+29.50%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.01%	—	—

Volatility

Volatility by Period

	IWMW	CWII	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.39%	—	—
Volatility (6M) Calculated over the trailing 6-month period	9.30%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	12.48%	13,701.30%	-13,688.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.05%	13,701.30%	-13,685.25%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.05%	13,701.30%	-13,685.25%

IWMW vs. CWII - Expense Ratio Comparison

IWMW has a 0.39% expense ratio, which is lower than CWII's 1.03% expense ratio.

Dividends

IWMW vs. CWII - Dividend Comparison

IWMW's dividend yield for the trailing twelve months is around 21.69%, less than CWII's 123.26% yield.

Position	TTM	2025	2024
CWII REX CRWV Growth & Income ETF	123.26%	6.09%	0.00%
IWMW iShares Russell 2000 BuyWrite ETF	21.69%	20.98%	17.73%

Frequently Asked Questions

Can I hold both IWMW and CWII in my portfolio?

IWMW and CWII have a correlation of 0.39, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, IWMW or CWII?

On fees, IWMW is cheaper at 0.39% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, IWMW or CWII?

IWMW is cheaper with a 0.39% expense ratio, compared with 1.03% for CWII.

Which ETF pays a higher dividend yield, IWMW or CWII?

CWII has the higher dividend yield at 123.26%, compared with 21.69% for IWMW.

What is the main difference between IWMW and CWII?

They also come from different issuers: iShares and REX Shares. Their fees differ too: 0.39% for IWMW and 1.03% for CWII.