IWMW vs. FESM

Last updated Apr 1, 2026

Compare and contrast key facts about iShares Russell 2000 BuyWrite ETF (IWMW) and Fidelity Enhanced Small Cap ETF (FESM).

IWMW and FESM are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. IWMW is a passively managed fund by iShares that tracks the performance of the Cboe FTSE Russell IWM 2% OTM BuyWrite Index - Benchmark TR Gross. It was launched on Mar 14, 2024. FESM is an actively managed fund by Fidelity. It was launched on Dec 20, 2007.

Performance

IWMW vs. FESM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Russell 2000 BuyWrite ETF (IWMW) and Fidelity Enhanced Small Cap ETF (FESM). The values are adjusted to include any dividend payments, if applicable.

IWMW vs. FESM - Yearly Performance Comparison

	2026 (YTD)	2025	2024
IWMW iShares Russell 2000 BuyWrite ETF	-0.04%	7.82%	6.09%
FESM Fidelity Enhanced Small Cap ETF	0.82%	17.88%	12.97%

Returns By Period

In the year-to-date period, IWMW achieves a -0.04% return, which is significantly lower than FESM's 0.82% return.

IWMW

• 1D: 2.35%
• 1M: -3.58%
• YTD: -0.04%
• 6M: 1.69%
• 1Y: 13.98%
• 3Y*: —
• 5Y*: —
• 10Y*: —

FESM

• 1D: 3.29%
• 1M: -4.77%
• YTD: 0.82%
• 6M: 4.42%
• 1Y: 29.74%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

IWMW vs. FESM - Expense Ratio Comparison

IWMW has a 0.39% expense ratio, which is higher than FESM's 0.28% expense ratio.

IWMW

iShares Russell 2000 BuyWrite ETF

FESM

Fidelity Enhanced Small Cap ETF

Return for Risk

IWMW vs. FESM — Risk / Return Rank

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

IWMW

IWMW Risk / Return Rank: 46
IWMW Sharpe Ratio Rank: 43
IWMW Sortino Ratio Rank: 45
IWMW Omega Ratio Rank: 53
IWMW Calmar Ratio Rank: 40
IWMW Martin Ratio Rank: 48

FESM

FESM Risk / Return Rank: 76
FESM Sharpe Ratio Rank: 75
FESM Sortino Ratio Rank: 76
FESM Omega Ratio Rank: 69
FESM Calmar Ratio Rank: 82
FESM Martin Ratio Rank: 80

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. FESM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Russell 2000 BuyWrite ETF (IWMW) and Fidelity Enhanced Small Cap ETF (FESM). 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.

	IWMW	FESM	Difference
Sharpe ratio Return per unit of total volatility	0.76	1.30	-0.54
Sortino ratio Return per unit of downside risk	1.17	1.87	-0.70
Omega ratio Gain probability vs. loss probability	1.19	1.24	-0.05
Calmar ratio Return relative to maximum drawdown	0.98	2.19	-1.21
Martin ratio Return relative to average drawdown	4.44	8.40	-3.95
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IWMW vs. FESM - Sharpe Ratio Comparison

The current IWMW Sharpe Ratio is 0.76, which is lower than the FESM Sharpe Ratio of 1.30. The chart below compares the historical Sharpe Ratios of IWMW and FESM, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	IWMW	FESM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.76	1.30	-0.54
Sharpe Ratio (All Time) Calculated using the full available price history	0.41	0.96	-0.55

Correlation

The correlation between IWMW and FESM is 0.91, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

IWMW vs. FESM - Dividend Comparison

IWMW's dividend yield for the trailing twelve months is around 22.56%, more than FESM's 0.63% yield.

	TTM	2025	2024	2023
IWMW iShares Russell 2000 BuyWrite ETF	22.56%	20.98%	17.73%	0.00%
FESM Fidelity Enhanced Small Cap ETF	0.63%	0.82%	1.08%	0.06%

Drawdowns

IWMW vs. FESM - Drawdown Comparison

The maximum IWMW drawdown since its inception was -21.82%, smaller than the maximum FESM drawdown of -26.93%. Use the drawdown chart below to compare losses from any high point for IWMW and FESM.

Drawdown Indicators

	IWMW	FESM	Difference
Max Drawdown Largest peak-to-trough decline	-21.82%	-26.93%	+5.11%
Max Drawdown (1Y) Largest decline over 1 year	-13.89%	-13.54%	-0.35%
Current Drawdown Current decline from peak	-4.76%	-7.23%	+2.47%
Average Drawdown Average peak-to-trough decline	-4.10%	-5.04%	+0.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.06%	3.53%	-0.47%

Volatility

IWMW vs. FESM - Volatility Comparison

The current volatility for iShares Russell 2000 BuyWrite ETF (IWMW) is 5.65%, while Fidelity Enhanced Small Cap ETF (FESM) has a volatility of 7.40%. This indicates that IWMW experiences smaller price fluctuations and is considered to be less risky than FESM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IWMW	FESM	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.65%	7.40%	-1.75%
Volatility (6M) Calculated over the trailing 6-month period	10.23%	14.26%	-4.03%
Volatility (1Y) Calculated over the trailing 1-year period	18.38%	22.98%	-4.60%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.57%	21.49%	-4.92%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.57%	21.49%	-4.92%