ACWV vs. IWM

Last updated Apr 1, 2026

Compare and contrast key facts about iShares MSCI Global Min Vol Factor ETF (ACWV) and iShares Russell 2000 ETF (IWM).

ACWV and IWM are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. ACWV is a passively managed fund by iShares that tracks the performance of the MSCI AC World Minimum Volatility (USD). It was launched on Oct 18, 2011. IWM is a passively managed fund by iShares that tracks the performance of the Russell 2000 Index. It was launched on May 22, 2000. Both ACWV and IWM are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

ACWV vs. IWM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares MSCI Global Min Vol Factor ETF (ACWV) and iShares Russell 2000 ETF (IWM). The values are adjusted to include any dividend payments, if applicable.

ACWV vs. IWM - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACWV iShares MSCI Global Min Vol Factor ETF	0.64%	11.04%	11.38%	8.23%	-10.36%	13.97%	3.04%	21.04%	-1.42%	18.57%
IWM iShares Russell 2000 ETF	0.93%	12.66%	11.38%	16.83%	-20.48%	14.54%	20.03%	25.39%	-11.12%	14.58%

Returns By Period

In the year-to-date period, ACWV achieves a 0.64% return, which is significantly lower than IWM's 0.93% return. Over the past 10 years, ACWV has underperformed IWM with an annualized return of 7.34%, while IWM has yielded a comparatively higher 9.76% annualized return.

ACWV

• 1D: 1.37%
• 1M: -4.54%
• YTD: 0.64%
• 6M: 0.74%
• 1Y: 4.86%
• 3Y*: 9.78%
• 5Y*: 6.10%
• 10Y*: 7.34%

IWM

• 1D: 3.50%
• 1M: -4.96%
• YTD: 0.93%
• 6M: 3.02%
• 1Y: 25.66%
• 3Y*: 12.94%
• 5Y*: 3.34%
• 10Y*: 9.76%

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

ACWV vs. IWM - Expense Ratio Comparison

ACWV has a 0.20% expense ratio, which is higher than IWM's 0.19% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

ACWV

iShares MSCI Global Min Vol Factor ETF

IWM

iShares Russell 2000 ETF

Return for Risk

ACWV vs. IWM — Risk / Return Rank

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

ACWV

ACWV Risk / Return Rank: 30
ACWV Sharpe Ratio Rank: 28
ACWV Sortino Ratio Rank: 26
ACWV Omega Ratio Rank: 27
ACWV Calmar Ratio Rank: 32
ACWV Martin Ratio Rank: 37

IWM

IWM Risk / Return Rank: 69
IWM Sharpe Ratio Rank: 67
IWM Sortino Ratio Rank: 69
IWM Omega Ratio Rank: 61
IWM Calmar Ratio Rank: 75
IWM Martin Ratio Rank: 71

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.

ACWV vs. IWM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares MSCI Global Min Vol Factor ETF (ACWV) and iShares Russell 2000 ETF (IWM). 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.

	ACWV	IWM	Difference
Sharpe ratio Return per unit of total volatility	0.45	1.11	-0.66
Sortino ratio Return per unit of downside risk	0.69	1.66	-0.97
Omega ratio Gain probability vs. loss probability	1.10	1.21	-0.11
Calmar ratio Return relative to maximum drawdown	0.73	1.82	-1.10
Martin ratio Return relative to average drawdown	3.16	6.76	-3.60
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ACWV vs. IWM - Sharpe Ratio Comparison

The current ACWV Sharpe Ratio is 0.45, which is lower than the IWM Sharpe Ratio of 1.11. The chart below compares the historical Sharpe Ratios of ACWV and IWM, 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

	ACWV	IWM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.45	1.11	-0.66
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.60	0.15	+0.45
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.60	0.43	+0.17
Sharpe Ratio (All Time) Calculated using the full available price history	0.70	0.34	+0.36

Correlation

The correlation between ACWV and IWM is 0.66, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

ACWV vs. IWM - Dividend Comparison

ACWV's dividend yield for the trailing twelve months is around 2.07%, more than IWM's 1.02% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACWV iShares MSCI Global Min Vol Factor ETF	2.07%	2.09%	2.33%	2.41%	2.18%	1.92%	1.77%	2.54%	2.32%	2.04%	2.56%	2.28%
IWM iShares Russell 2000 ETF	1.02%	1.04%	1.15%	1.35%	1.48%	0.94%	1.04%	1.26%	1.40%	1.26%	1.38%	1.54%

Drawdowns

ACWV vs. IWM - Drawdown Comparison

The maximum ACWV drawdown since its inception was -28.82%, smaller than the maximum IWM drawdown of -59.05%. Use the drawdown chart below to compare losses from any high point for ACWV and IWM.

Drawdown Indicators

	ACWV	IWM	Difference
Max Drawdown Largest peak-to-trough decline	-28.82%	-59.05%	+30.23%
Max Drawdown (1Y) Largest decline over 1 year	-7.56%	-13.74%	+6.18%
Max Drawdown (5Y) Largest decline over 5 years	-18.14%	-31.91%	+13.77%
Max Drawdown (10Y) Largest decline over 10 years	-28.82%	-41.13%	+12.31%
Current Drawdown Current decline from peak	-4.54%	-7.91%	+3.37%
Average Drawdown Average peak-to-trough decline	-3.11%	-10.83%	+7.72%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.73%	3.70%	-1.97%

Volatility

ACWV vs. IWM - Volatility Comparison

The current volatility for iShares MSCI Global Min Vol Factor ETF (ACWV) is 3.24%, while iShares Russell 2000 ETF (IWM) has a volatility of 7.47%. This indicates that ACWV experiences smaller price fluctuations and is considered to be less risky than IWM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ACWV	IWM	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.24%	7.47%	-4.23%
Volatility (6M) Calculated over the trailing 6-month period	5.54%	14.47%	-8.93%
Volatility (1Y) Calculated over the trailing 1-year period	10.76%	23.18%	-12.42%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	10.25%	22.55%	-12.30%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	12.31%	22.99%	-10.68%