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SIZE vs. USMF
Performance
Return for Risk
Drawdowns
Volatility
Dividends

SIZE vs. USMF

Last updated Jun 4, 2026

SIZE (iShares MSCI USA Size Factor ETF) and USMF (WisdomTree US Multifactor Fund) are both Mid Cap Blend Equities funds - SIZE tracks the MSCI USA Low Size Index while USMF tracks the WisdomTree US Multifactor Index. Both are passively managed. Over the past 5 years, SIZE returned 8.07%/yr vs 7.67%/yr for USMF. Their correlation of 0.90 suggests significant overlap in exposure. SIZE charges 0.15%/yr vs 0.28%/yr for USMF.

Performance

SIZE vs. USMF - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares MSCI USA Size Factor ETF (SIZE) and WisdomTree US Multifactor Fund (USMF). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, SIZE achieves a 9.07% return, which is significantly higher than USMF's 4.36% return.

SIZE

1D
-0.68%
1M
3.62%
YTD
9.07%
6M
8.29%
1Y
18.11%
3Y*
15.94%
5Y*
8.07%
10Y*
11.76%

USMF

1D
-0.56%
1M
3.76%
YTD
4.36%
6M
4.80%
1Y
6.28%
3Y*
14.13%
5Y*
7.67%
10Y*
—
*Multi-year figures are annualized to reflect compound growth (CAGR)

SIZE vs. USMF - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
SIZE
iShares MSCI USA Size Factor ETF		9.07%10.51%14.37%17.78%-15.86%25.05%16.26%28.97%-6.59%8.93%
USMF
WisdomTree US Multifactor Fund		4.36%4.60%19.65%13.47%-8.82%21.26%12.01%24.06%-4.72%11.27%

Correlation

The correlation between SIZE and USMF is 0.83, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

Correlation
Correlation (1Y)
Calculated over the trailing 1-year period

0.83

Correlation (3Y)
Calculated over the trailing 3-year period

0.89

Correlation (5Y)
Calculated over the trailing 5-year period

0.92

Correlation (All Time)
Calculated using the full available price history since Aug 25, 2017

0.90

The correlation between SIZE and USMF has been stable across timeframes, ranging from 0.83 to 0.92 - a consistent structural relationship.

SIZE vs. USMF - Sectors Allocation Comparison

Sectors
SIZE
USMF

Technology

19.9%
35.6%

Industrials

16.1%
7.8%

Financial Services

13.5%
11.8%

Consumer Cyclical

9.8%
11.1%

Healthcare

9.6%
9.3%

Real Estate

5.7%
2.0%

Consumer Defensive

5.7%
5.2%

Utilities

5.5%
2.0%

Energy

5.2%
4.1%

Basic Materials

4.8%
0.9%

Communication Services

4.1%
10.3%

Technology

SIZE
19.9%
USMF
35.6%

Industrials

SIZE
16.1%
USMF
7.8%

Financial Services

SIZE
13.5%
USMF
11.8%

Consumer Cyclical

SIZE
9.8%
USMF
11.1%

Healthcare

SIZE
9.6%
USMF
9.3%

Real Estate

SIZE
5.7%
USMF
2.0%

Consumer Defensive

SIZE
5.7%
USMF
5.2%

Utilities

SIZE
5.5%
USMF
2.0%

Energy

SIZE
5.2%
USMF
4.1%

Basic Materials

SIZE
4.8%
USMF
0.9%

Communication Services

SIZE
4.1%
USMF
10.3%

Compare stocks, funds, or ETFs

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iShares MSCI USA Size Factor ETF

WisdomTree US Multifactor Fund

Often compared with SIZE:
SIZE vs. XLGSIZE vs. SPYSIZE vs. QUALSIZE vs. QDVA.DESIZE vs. VIGSIZE vs. VOOSIZE vs. DIVB
Often compared with USMF:
USMF vs. DYNFUSMF vs. VFMFUSMF vs. SCHMUSMF vs. SFLRUSMF vs. SPMOUSMF vs. SPYUSMF vs. VO

Return for Risk

SIZE vs. USMF — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
SIZE
SIZE Risk / Return Rank: 4444
Overall Rank
SIZE Sharpe Ratio Rank: 4040
Sharpe Ratio Rank
SIZE Sortino Ratio Rank: 4242
Sortino Ratio Rank
SIZE Omega Ratio Rank: 3838
Omega Ratio Rank
SIZE Calmar Ratio Rank: 4646
Calmar Ratio Rank
SIZE Martin Ratio Rank: 5252
Martin Ratio Rank
USMF
USMF Risk / Return Rank: 1919
Overall Rank
USMF Sharpe Ratio Rank: 1818
Sharpe Ratio Rank
USMF Sortino Ratio Rank: 1717
Sortino Ratio Rank
USMF Omega Ratio Rank: 1717
Omega Ratio Rank
USMF Calmar Ratio Rank: 2222
Calmar Ratio Rank
USMF Martin Ratio Rank: 2323
Martin Ratio Rank
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.

SIZE vs. USMF - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares MSCI USA Size Factor ETF (SIZE) and WisdomTree US Multifactor Fund (USMF). 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.

SIZEUSMFDifference
Sharpe ratioReturn per unit of total volatility
1.43
0.58

+0.85

Sortino ratioReturn per unit of downside risk
2.12
0.89

+1.24

Omega ratioGain probability vs. loss probability

1.25

1.10

+0.15

Calmar ratioReturn relative to maximum drawdown

2.28

0.98

+1.31

Martin ratioReturn relative to average drawdown

8.88

2.93

+5.95

Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SIZE vs. USMF - Sharpe Ratio Comparison

The current SIZE Sharpe Ratio is 1.43, which is higher than the USMF Sharpe Ratio of 0.58. The chart below compares the historical Sharpe Ratios of SIZE and USMF, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Sharpe Ratios by Period

SIZEUSMFDifference

Sharpe Ratio (1Y)

Calculated over the trailing 1-year period

1.43

0.58

+0.85

Sharpe Ratio (5Y)

Calculated over the trailing 5-year period

0.47

0.54

-0.07

Sharpe Ratio (10Y)

Calculated over the trailing 10-year period

0.63

—

—

Sharpe Ratio (All Time)

Calculated using the full available price history

0.68

0.63

+0.06

Drawdowns

SIZE vs. USMF - Drawdown Comparison

The maximum SIZE drawdown since its inception was -39.15%, which is greater than USMF's maximum drawdown of -36.24%. Use the drawdown chart below to compare losses from any high point for SIZE and USMF.

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Drawdown Indicators

SIZEUSMFDifference

Max Drawdown

Largest peak-to-trough decline

-39.15%

-36.24%

-2.91%

Max Drawdown (1Y)

Largest decline over 1 year

-7.97%

-6.47%

-1.50%

Max Drawdown (3Y)

Largest decline over 3 years

-18.71%

-15.39%

-3.32%

Max Drawdown (5Y)

Largest decline over 5 years

-24.03%

-18.10%

-5.93%

Max Drawdown (10Y)

Largest decline over 10 years

-39.15%

—

—

Current Drawdown

Current decline from peak

-0.68%

-0.56%

-0.12%

Average Drawdown

Average peak-to-trough decline

-4.18%

-4.16%

-0.02%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.04%

2.15%

-0.11%

Volatility

SIZE vs. USMF - Volatility Comparison

iShares MSCI USA Size Factor ETF (SIZE) has a higher volatility of 3.17% compared to WisdomTree US Multifactor Fund (USMF) at 2.30%. This indicates that SIZE's price experiences larger fluctuations and is considered to be riskier than USMF based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

SIZEUSMFDifference

Volatility (1M)

Calculated over the trailing 1-month period

3.17%

2.30%

+0.87%

Volatility (6M)

Calculated over the trailing 6-month period

9.54%

7.43%

+2.11%

Volatility (1Y)

Calculated over the trailing 1-year period

12.73%

10.79%

+1.94%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

17.39%

14.27%

+3.12%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

18.69%

16.97%

+1.72%

SIZE vs. USMF - Expense Ratio Comparison

SIZE has a 0.15% expense ratio, which is lower than USMF's 0.28% expense ratio.

Dividends

SIZE vs. USMF - Dividend Comparison

SIZE's dividend yield for the trailing twelve months is around 1.42%, more than USMF's 1.32% yield.

PositionTTM20252024202320222021202020192018201720162015
SIZE
iShares MSCI USA Size Factor ETF		1.42%1.50%1.53%1.42%1.59%1.19%1.43%1.35%2.43%1.58%1.88%1.95%
USMF
WisdomTree US Multifactor Fund		1.32%1.37%1.22%1.33%1.74%1.42%1.34%1.38%1.45%0.67%0.00%0.00%

Frequently Asked Questions

SIZE and USMF have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

SIZE has higher volatility (3.17%) compared to USMF (2.30%). In terms of maximum drawdown, SIZE dropped -39.15% vs USMF's -36.24%.

On 5-year performance, SIZE leads with 8.07% vs 7.67% for USMF. On fees, SIZE is cheaper at 0.15% per year. On volatility, USMF has been the lower-risk option at 2.30%. The better choice depends on whether you care most about return, fees, risk, or income.

Over the 5-year period, SIZE has performed better with a 8.07% return vs 7.67%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

SIZE is cheaper with a 0.15% expense ratio, compared with 0.28% for USMF.

SIZE has the higher dividend yield at 1.42%, compared with 1.32% for USMF.

SIZE tracks MSCI USA Low Size Index, while USMF tracks WisdomTree US Multifactor Index. They also come from different issuers: iShares and WisdomTree. Their fees differ too: 0.15% for SIZE and 0.28% for USMF.

SIZE currently has the higher Sharpe Ratio (1.43 vs 0.58), 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.

Portfolio Optimizer

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