IWMW vs. SGOV

Last updated Aug 5, 2026

IWMW (iShares Russell 2000 BuyWrite ETF) and SGOV (iShares 0-3 Month Treasury Bond ETF) are both exchange-traded funds - IWMW is a Derivative Income fund tracking the Cboe FTSE Russell IWM 2% OTM BuyWrite Index, while SGOV is a Ultrashort Bond fund tracking the ICE 0-3 Month US Treasury Securities Index. Both are passively managed. Over the past year, IWMW returned 27.46% vs 3.84% for SGOV. Their -0.04 correlation means they have often moved in opposite directions in the past. IWMW charges 0.39%/yr vs 0.09%/yr for SGOV.

Performance

IWMW vs. SGOV - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Russell 2000 BuyWrite ETF (IWMW) and iShares 0-3 Month Treasury Bond ETF (SGOV). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IWMW achieves a 16.00% return, which is significantly higher than SGOV's 2.14% return.

IWMW

• 1D: 0.93%
• 1M: 2.47%
• 6M: 13.33%
• YTD: 16.00%
• 1Y: 27.46%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 12.47%

SGOV

• 1D: 0.01%
• 1M: 0.30%
• 6M: 1.81%
• YTD: 2.14%
• 1Y: 3.84%
• 3Y*: 4.62%
• 5Y*: 3.66%
• 10Y*: —
• ALL TIME*: 2.96%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
IWMW iShares Russell 2000 BuyWrite ETF	$588.35K	$501.88K	$531.86K
SGOV iShares 0-3 Month Treasury Bond ETF	$2.10B	$1.90B	$2.07B

IWMW vs. SGOV - Yearly Performance Comparison

	2026 (YTD)	2025	2024
IWMW iShares Russell 2000 BuyWrite ETF	16.00%	7.82%	5.85%
SGOV iShares 0-3 Month Treasury Bond ETF	2.14%	4.24%	4.13%

Correlation

The correlation between IWMW and SGOV is -0.08, meaning there was essentially no consistent relationship between their historical price movements. Each responded to its own set of market drivers.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	-0.08
Correlation (All Time) Calculated using the full available price history since Mar 15, 2024	-0.04

Return for Risk

IWMW vs. SGOV — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

IWMW

IWMW Risk / Return Rank: 86
IWMW Sharpe Ratio Rank: 86
IWMW Sortino Ratio Rank: 83
IWMW Omega Ratio Rank: 89
IWMW Calmar Ratio Rank: 89
IWMW Martin Ratio Rank: 86

SGOV

SGOV Risk / Return Rank: 100
SGOV Sharpe Ratio Rank: 100
SGOV Sortino Ratio Rank: 100
SGOV Omega Ratio Rank: 100
SGOV Calmar Ratio Rank: 100
SGOV Martin Ratio Rank: 100

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

IWMW vs. SGOV - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Russell 2000 BuyWrite ETF (IWMW) and iShares 0-3 Month Treasury Bond ETF (SGOV). 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	SGOV	Difference
Sharpe ratio: Return per unit of total volatility	2.21	20.72	-18.51
Sortino ratio: Return per unit of downside risk	2.99	379.24	-376.25
Omega ratio: Gain probability vs. loss probability	1.43	379.49	-378.05
Calmar ratio: Return relative to maximum drawdown	3.97	387.22	-383.25
Martin ratio: Return relative to average drawdown	13.75	6,134.73	-6,120.98

IWMW vs. SGOV - Sharpe Ratio Comparison

The current IWMW Sharpe Ratio is 2.21, which is lower than the SGOV Sharpe Ratio of 20.72. The chart below compares the historical Sharpe Ratios of IWMW and SGOV, 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

IWMW vs. SGOV - Drawdown Comparison

The maximum IWMW drawdown since its inception was -21.82%, which is greater than SGOV's maximum drawdown of -0.03%. Use the drawdown chart below to compare losses from any high point for IWMW and SGOV.

Drawdown Indicators

	IWMW	SGOV	Difference
Max Drawdown Largest peak-to-trough decline	-21.82%	-0.03%	-21.79%
Max Drawdown (1Y) Largest decline over 1 year	-6.94%	-0.01%	-6.93%
Max Drawdown (3Y) Largest decline over 3 years	—	-0.01%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-0.03%	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-3.60%	0.00%	-3.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.00%	0.00%	+2.00%

Volatility

IWMW vs. SGOV - Volatility Comparison

iShares Russell 2000 BuyWrite ETF (IWMW) has a higher volatility of 3.21% compared to iShares 0-3 Month Treasury Bond ETF (SGOV) at 0.04%. This indicates that IWMW's price experiences larger fluctuations and is considered to be riskier than SGOV based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IWMW	SGOV	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.21%	0.04%	+3.17%
Volatility (6M) Calculated over the trailing 6-month period	9.40%	0.13%	+9.27%
Volatility (1Y) Calculated over the trailing 1-year period	12.61%	0.19%	+12.42%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.81%	0.24%	+15.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.81%	0.23%	+15.58%

IWMW vs. SGOV - Expense Ratio Comparison

IWMW has a 0.39% expense ratio, which is higher than SGOV's 0.09% expense ratio.

Dividends

IWMW vs. SGOV - Dividend Comparison

IWMW's dividend yield for the trailing twelve months is around 20.25%, more than SGOV's 3.75% yield.

Position	TTM	2025	2024	2023	2022	2021	2020
IWMW iShares Russell 2000 BuyWrite ETF	20.25%	20.98%	17.73%	0.00%	0.00%	0.00%	0.00%
SGOV iShares 0-3 Month Treasury Bond ETF	3.75%	4.10%	5.10%	4.87%	1.45%	0.03%	0.05%

Frequently Asked Questions

Can I hold both IWMW and SGOV in my portfolio?

IWMW and SGOV have a correlation of -0.08, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IWMW or SGOV?

IWMW has higher volatility (3.21%) compared to SGOV (0.04%). In terms of maximum drawdown, IWMW dropped -21.82% vs SGOV's -0.03%.

Which ETF is better, IWMW or SGOV?

On 1-year performance, IWMW leads with 27.46% vs 3.84% for SGOV. On fees, SGOV is cheaper at 0.09% per year. On volatility, SGOV has been the lower-risk option at 0.04%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, IWMW or SGOV?

Over the 1-year period, IWMW has performed better with a 27.46% return vs 3.84%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, IWMW or SGOV?

SGOV is cheaper with a 0.09% expense ratio, compared with 0.39% for IWMW.

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

IWMW has the higher dividend yield at 20.25%, compared with 3.75% for SGOV.

What is the main difference between IWMW and SGOV?

IWMW is categorized as Derivative Income, while SGOV is Ultrashort Bond. IWMW tracks Cboe FTSE Russell IWM 2% OTM BuyWrite Index, while SGOV tracks ICE 0-3 Month US Treasury Securities Index. Their fees differ too: 0.39% for IWMW and 0.09% for SGOV.

Which has better risk-adjusted returns?

SGOV currently has the higher Sharpe Ratio (20.72 vs 2.21), 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.