IWY vs. MFUS

Last updated Jun 4, 2026

IWY (iShares Russell Top 200 Growth ETF) and MFUS (PIMCO RAFI Dynamic Multi-Factor U.S. Equity ETF) are both Large Cap Growth Equities funds - IWY tracks the Russell Top 200 Growth Index while MFUS tracks the RAFI Dynamic Multi-Factor U.S. Index​. Both are passively managed. Over the past 5 years, IWY returned 16.45%/yr vs 12.82%/yr for MFUS. A 0.72 correlation means they provide meaningful diversification when combined. IWY charges 0.20%/yr vs 0.30%/yr for MFUS.

Performance

IWY vs. MFUS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Russell Top 200 Growth ETF (IWY) and PIMCO RAFI Dynamic Multi-Factor U.S. Equity ETF (MFUS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IWY achieves a 7.20% return, which is significantly lower than MFUS's 16.37% return.

IWY

• 1D: -1.41%
• 1M: 5.83%
• YTD: 7.20%
• 6M: 6.65%
• 1Y: 26.69%
• 3Y*: 25.47%
• 5Y*: 16.45%
• 10Y*: 19.57%

MFUS

• 1D: 0.03%
• 1M: 5.72%
• YTD: 16.37%
• 6M: 16.58%
• 1Y: 28.04%
• 3Y*: 22.25%
• 5Y*: 12.82%
• 10Y*: —

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

IWY vs. MFUS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IWY iShares Russell Top 200 Growth ETF	7.20%	18.19%	34.89%	46.49%	-29.91%	31.05%	39.01%	36.20%	-0.72%	9.62%
MFUS PIMCO RAFI Dynamic Multi-Factor U.S. Equity ETF	16.37%	16.02%	20.17%	12.19%	-5.82%	24.10%	10.64%	26.17%	-7.30%	11.20%

Correlation

The correlation between IWY and MFUS is 0.57, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.57
Correlation (3Y) Calculated over the trailing 3-year period	0.65
Correlation (5Y) Calculated over the trailing 5-year period	0.70
Correlation (All Time) Calculated using the full available price history since Sep 7, 2017	0.72

The correlation between IWY and MFUS shifts across timeframes, from 0.57 (1 year) to 0.72 (all time), reflecting how their relationship changes across market environments.

IWY vs. MFUS - Sectors Allocation Comparison

Sectors	IWY	MFUS
Technology	54.9%	21.8%
Communication Services	13.9%	5.3%
Consumer Cyclical	11.4%	10.6%
Healthcare	6.6%	13.5%
Financial Services	5.6%	12.6%
Industrials	4.0%	12.6%
Consumer Defensive	3.0%	10.3%
Utilities	1.1%	1.7%
Real Estate	0.3%	1.8%
Basic Materials	0.3%	2.8%
Energy	0.0%	7.0%

Return for Risk

IWY vs. MFUS — Risk / Return Rank

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

IWY

IWY Risk / Return Rank: 41
IWY Sharpe Ratio Rank: 49
IWY Sortino Ratio Rank: 46
IWY Omega Ratio Rank: 46
IWY Calmar Ratio Rank: 32
IWY Martin Ratio Rank: 34

MFUS

MFUS Risk / Return Rank: 82
MFUS Sharpe Ratio Rank: 80
MFUS Sortino Ratio Rank: 83
MFUS Omega Ratio Rank: 78
MFUS Calmar Ratio Rank: 83
MFUS Martin Ratio Rank: 86

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.

IWY vs. MFUS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Russell Top 200 Growth ETF (IWY) and PIMCO RAFI Dynamic Multi-Factor U.S. Equity ETF (MFUS). 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.

	IWY	MFUS	Difference
Sharpe ratio: Return per unit of total volatility	1.73	2.63	-0.90
Sortino ratio: Return per unit of downside risk	2.36	3.77	-1.41
Omega ratio: Gain probability vs. loss probability	1.30	1.47	-0.17
Calmar ratio: Return relative to maximum drawdown	1.61	4.41	-2.80
Martin ratio: Return relative to average drawdown	5.26	18.13	-12.87
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IWY vs. MFUS - Sharpe Ratio Comparison

The current IWY Sharpe Ratio is 1.73, which is lower than the MFUS Sharpe Ratio of 2.63. The chart below compares the historical Sharpe Ratios of IWY and MFUS, 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

	IWY	MFUS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.73	2.63	-0.90
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.77	0.86	-0.09
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.94	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.92	0.79	+0.13

Drawdowns

IWY vs. MFUS - Drawdown Comparison

The maximum IWY drawdown since its inception was -32.68%, smaller than the maximum MFUS drawdown of -35.21%. Use the drawdown chart below to compare losses from any high point for IWY and MFUS.

Drawdown Indicators

	IWY	MFUS	Difference
Max Drawdown Largest peak-to-trough decline	-32.68%	-35.21%	+2.53%
Max Drawdown (1Y) Largest decline over 1 year	-16.63%	-6.39%	-10.24%
Max Drawdown (3Y) Largest decline over 3 years	-23.22%	-15.39%	-7.83%
Max Drawdown (5Y) Largest decline over 5 years	-32.68%	-18.22%	-14.46%
Max Drawdown (10Y) Largest decline over 10 years	-32.68%	—	—
Current Drawdown Current decline from peak	-1.82%	0.00%	-1.82%
Average Drawdown Average peak-to-trough decline	-4.75%	-4.00%	-0.75%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.09%	1.55%	+3.54%

Volatility

IWY vs. MFUS - Volatility Comparison

iShares Russell Top 200 Growth ETF (IWY) has a higher volatility of 3.69% compared to PIMCO RAFI Dynamic Multi-Factor U.S. Equity ETF (MFUS) at 3.19%. This indicates that IWY's price experiences larger fluctuations and is considered to be riskier than MFUS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IWY	MFUS	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.69%	3.19%	+0.50%
Volatility (6M) Calculated over the trailing 6-month period	11.65%	8.22%	+3.43%
Volatility (1Y) Calculated over the trailing 1-year period	15.54%	10.72%	+4.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.48%	15.03%	+6.45%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.97%	17.35%	+3.62%

IWY vs. MFUS - Expense Ratio Comparison

IWY has a 0.20% expense ratio, which is lower than MFUS's 0.30% expense ratio.

Dividends

IWY vs. MFUS - Dividend Comparison

IWY's dividend yield for the trailing twelve months is around 0.33%, less than MFUS's 1.36% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IWY iShares Russell Top 200 Growth ETF	0.33%	0.36%	0.42%	0.68%	0.88%	0.50%	0.71%	1.06%	1.32%	1.26%	1.51%	1.58%
MFUS PIMCO RAFI Dynamic Multi-Factor U.S. Equity ETF	1.36%	1.54%	1.45%	1.96%	2.07%	1.35%	1.72%	1.89%	1.69%	1.01%	0.00%	0.00%

Frequently Asked Questions

Can I hold both IWY and MFUS in my portfolio?

IWY and MFUS have a correlation of 0.57, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IWY or MFUS?

IWY has higher volatility (3.69%) compared to MFUS (3.19%). In terms of maximum drawdown, IWY dropped -32.68% vs MFUS's -35.21%.

Which ETF is better, IWY or MFUS?

On 5-year performance, IWY leads with 16.45% vs 12.82% for MFUS. On fees, IWY is cheaper at 0.20% per year. On volatility, MFUS has been the lower-risk option at 3.19%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, IWY or MFUS?

Over the 5-year period, IWY has performed better with a 16.45% return vs 12.82%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, IWY or MFUS?

IWY is cheaper with a 0.20% expense ratio, compared with 0.30% for MFUS.

Which ETF pays a higher dividend yield, IWY or MFUS?

MFUS has the higher dividend yield at 1.36%, compared with 0.33% for IWY.

What is the main difference between IWY and MFUS?

IWY tracks Russell Top 200 Growth Index, while MFUS tracks RAFI Dynamic Multi-Factor U.S. Index​. They also come from different issuers: iShares and PIMCO. Their fees differ too: 0.20% for IWY and 0.30% for MFUS.

Which has better risk-adjusted returns?

MFUS currently has the higher Sharpe Ratio (2.63 vs 1.73), 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.