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SIZE vs. USMF
Performance
Return for Risk
Drawdowns
Volatility
Dividends

SIZE vs. USMF

Last updated Aug 2, 2026
Documentation

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 7.99%/yr vs 7.39%/yr for USMF. Their correlation of 0.89 means they have usually moved in the same direction. 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 11.20% return, which is significantly higher than USMF's 3.98% return.

SIZE

1D
-0.35%
1M
0.26%
6M
8.60%
YTD
11.20%
1Y
17.37%
3Y*
13.59%
5Y*
7.99%
10Y*
11.70%
ALL TIME*
11.92%

USMF

1D
0.14%
1M
0.09%
6M
3.76%
YTD
3.98%
1Y
6.68%
3Y*
11.64%
5Y*
7.39%
10Y*
—
ALL TIME*
10.32%
*Multi-year figures are annualized to reflect compound growth (CAGR)

Liquidity Comparison

PositionAvg. Volume Value (2W)Avg. Volume Value (1M)Avg. Volume Value (3M)

SIZE

iShares MSCI USA Size Factor ETF
$662.14K$788.99K$1.01M

USMF

WisdomTree US Multifactor Fund
$1.11M$1.03M$1.79M

SIZE vs. USMF - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
SIZE
iShares MSCI USA Size Factor ETF		11.20%10.51%14.37%17.78%-15.86%25.05%16.26%28.97%-6.59%8.78%
USMF
WisdomTree US Multifactor Fund		3.98%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 0.79, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

Correlation
Correlation (1Y)
Focuses on recent behavior, but can change the most.

0.79

Correlation (3Y)
Balances recent behavior with more history.

0.87

Correlation (5Y)
Shows whether the relationship held over a longer period.

0.91

Correlation (All Time)
Calculated using the full available price history since Aug 24, 2017

0.89

The correlation between SIZE and USMF shifts across timeframes, from 0.79 (1 year) to 0.91 (5 years), reflecting how their relationship changes across market environments.

SIZE vs. USMF - Sectors Allocation Comparison

Sectors
SIZE
USMF

Technology

18.6%
35.6%

Financial Services

15.7%
11.4%

Industrials

14.8%
9.9%

Healthcare

11.4%
9.7%

Consumer Cyclical

10.9%
10.4%

Utilities

5.6%
2.1%

Consumer Defensive

5.5%
4.5%

Real Estate

5.3%
2.0%

Basic Materials

4.9%
1.4%

Energy

3.8%
2.7%

Communication Services

3.3%
10.3%

Technology

SIZE
18.6%
USMF
35.6%

Financial Services

SIZE
15.7%
USMF
11.4%

Industrials

SIZE
14.8%
USMF
9.9%

Healthcare

SIZE
11.4%
USMF
9.7%

Consumer Cyclical

SIZE
10.9%
USMF
10.4%

Utilities

SIZE
5.6%
USMF
2.1%

Consumer Defensive

SIZE
5.5%
USMF
4.5%

Real Estate

SIZE
5.3%
USMF
2.0%

Basic Materials

SIZE
4.9%
USMF
1.4%

Energy

SIZE
3.8%
USMF
2.7%

Communication Services

SIZE
3.3%
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. QGRO
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 historical risk-adjusted metric ranks over the past 12 months.
SIZE
SIZE Risk / Return Rank: 5555
Overall Rank
SIZE Sharpe Ratio Rank: 5151
Sharpe Ratio Rank
SIZE Sortino Ratio Rank: 5353
Sortino Ratio Rank
SIZE Omega Ratio Rank: 4848
Omega Ratio Rank
SIZE Calmar Ratio Rank: 5757
Calmar Ratio Rank
SIZE Martin Ratio Rank: 6565
Martin Ratio Rank
USMF
USMF Risk / Return Rank: 2626
Overall Rank
USMF Sharpe Ratio Rank: 2323
Sharpe Ratio Rank
USMF Sortino Ratio Rank: 2323
Sortino Ratio Rank
USMF Omega Ratio Rank: 2222
Omega Ratio Rank
USMF Calmar Ratio Rank: 2929
Calmar Ratio Rank
USMF Martin Ratio Rank: 3232
Martin Ratio Rank
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.

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.

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.

SIZEUSMFDifference
Sharpe ratioReturn per unit of total volatility
1.25
0.53

+0.72

Sortino ratioReturn per unit of downside risk
1.87
0.83

+1.04

Omega ratioGain probability vs. loss probability

1.22

1.10

+0.12

Calmar ratioReturn relative to maximum drawdown

2.02

0.95

+1.07

Martin ratioReturn relative to average drawdown

7.91

2.89

+5.02

SIZE vs. USMF - Sharpe Ratio Comparison

The current SIZE Sharpe Ratio is 1.25, which is higher than the USMF Sharpe Ratio of 0.53. 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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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

-1.39%

-2.50%

+1.11%

Average Drawdown

Average peak-to-trough decline

-4.14%

-4.12%

-0.02%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.03%

2.11%

-0.08%

Volatility

SIZE vs. USMF - Volatility Comparison

The current volatility for iShares MSCI USA Size Factor ETF (SIZE) is 3.12%, while WisdomTree US Multifactor Fund (USMF) has a volatility of 3.96%. This indicates that SIZE experiences smaller price fluctuations and is considered to be less risky 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

3.12%

3.96%

-0.84%

Volatility (6M)

Calculated over the trailing 6-month period

9.56%

9.25%

+0.31%

Volatility (1Y)

Calculated over the trailing 1-year period

12.93%

11.66%

+1.27%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

17.40%

14.40%

+3.00%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

18.67%

16.95%

+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 1.37%, more than USMF's 1.32% yield.

PositionTTM20252024202320222021202020192018201720162015
SIZE
iShares MSCI USA Size Factor ETF		1.37%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 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

USMF has higher volatility (3.96%) compared to SIZE (3.12%). In terms of maximum drawdown, SIZE dropped -39.15% vs USMF's -36.24%.

On 5-year performance, SIZE leads with 7.99% vs 7.39% for USMF. On fees, SIZE is cheaper at 0.15% per year. On volatility, SIZE has been the lower-risk option at 3.12%. 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 7.99% return vs 7.39%. 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 1.37%, 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 (1.25 vs 0.53), 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.

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