IUSF.L vs. IWSZ.L

Last updated Jul 18, 2026

IUSF.L (iShares Edge MSCI USA Size Factor UCITS ETF) and IWSZ.L (iShares MSCI World Mid-Cap Equal Weight UCITS ETF) are both Mid Cap Blend Equities funds from iShares - IUSF.L tracks the Russell Mid Cap TR USD while IWSZ.L tracks the MSCI World Mid-Cap Equal Weighted Index. Both are passively managed. Over the past 5 years, IUSF.L returned 7.07%/yr vs 6.49%/yr for IWSZ.L. Their correlation of 0.82 suggests significant overlap in exposure. IUSF.L charges 0.20%/yr vs 0.30%/yr for IWSZ.L.

Performance

IUSF.L vs. IWSZ.L - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in iShares Edge MSCI USA Size Factor UCITS ETF (IUSF.L) and iShares MSCI World Mid-Cap Equal Weight UCITS ETF (IWSZ.L). The values are adjusted to include any dividend payments, if applicable.

Different Trading Currencies

IUSF.L is traded in GBp, while IWSZ.L is traded in USD. To make them comparable, the IWSZ.L values have been converted to GBp using the latest available exchange rates.

Returns By Period

In the year-to-date period, IUSF.L achieves a 8.56% return, which is significantly higher than IWSZ.L's 7.38% return.

IUSF.L

• 1D: -0.15%
• 1M: 0.31%
• 6M: 4.64%
• YTD: 8.56%
• 1Y: 13.53%
• 3Y*: 10.58%
• 5Y*: 7.07%
• 10Y*: —

IWSZ.L

• 1D: -0.29%
• 1M: -1.24%
• 6M: 3.97%
• YTD: 7.38%
• 1Y: 15.09%
• 3Y*: 11.46%
• 5Y*: 6.49%
• 10Y*: 8.06%

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

IUSF.L vs. IWSZ.L - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IUSF.L iShares Edge MSCI USA Size Factor UCITS ETF	8.56%	1.00%	14.60%	10.79%	-8.57%	27.74%	13.62%	23.94%	-5.85%	7.91%
IWSZ.L iShares MSCI World Mid-Cap Equal Weight UCITS ETF	7.38%	12.75%	7.79%	10.23%	-8.21%	13.62%	7.53%	18.70%	-9.34%	13.60%

Correlation

The correlation between IUSF.L and IWSZ.L is 0.73, 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	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.78
Correlation (5Y) Calculated over the trailing 5-year period	0.82
Correlation (All Time) Calculated using the full available price history since Oct 17, 2016	0.82

The correlation between IUSF.L and IWSZ.L has been stable across timeframes, ranging from 0.73 to 0.82 - a consistent structural relationship.

IUSF.L vs. IWSZ.L - Sectors Allocation Comparison

Sectors	IUSF.L	IWSZ.L
Technology	18.5%	11.7%
Industrials	16.6%	20.4%
Financial Services	13.5%	14.2%
Consumer Cyclical	12.3%	11.0%
Healthcare	10.9%	8.7%
Real Estate	6.4%	6.3%
Utilities	6.3%	6.4%
Consumer Defensive	5.8%	6.8%
Basic Materials	4.5%	7.3%
Communication Services	3.3%	3.8%
Energy	2.0%	2.9%

Return for Risk

IUSF.L vs. IWSZ.L — Risk / Return Rank

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

IUSF.L

IUSF.L Risk / Return Rank: 43
IUSF.L Sharpe Ratio Rank: 44
IUSF.L Sortino Ratio Rank: 42
IUSF.L Omega Ratio Rank: 40
IUSF.L Calmar Ratio Rank: 45
IUSF.L Martin Ratio Rank: 44

IWSZ.L

IWSZ.L Risk / Return Rank: 43
IWSZ.L Sharpe Ratio Rank: 43
IWSZ.L Sortino Ratio Rank: 45
IWSZ.L Omega Ratio Rank: 42
IWSZ.L Calmar Ratio Rank: 40
IWSZ.L Martin Ratio Rank: 47

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.

IUSF.L vs. IWSZ.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Edge MSCI USA Size Factor UCITS ETF (IUSF.L) and iShares MSCI World Mid-Cap Equal Weight UCITS ETF (IWSZ.L). 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.

	IUSF.L	IWSZ.L	Difference
Sharpe ratio: Return per unit of total volatility	1.23	1.24	-0.01
Sortino ratio: Return per unit of downside risk	1.74	1.78	-0.04
Omega ratio: Gain probability vs. loss probability	1.21	1.23	-0.01
Calmar ratio: Return relative to maximum drawdown	1.82	1.88	-0.06
Martin ratio: Return relative to average drawdown	5.55	6.57	-1.02

IUSF.L vs. IWSZ.L - Sharpe Ratio Comparison

The current IUSF.L Sharpe Ratio is 1.23, which is comparable to the IWSZ.L Sharpe Ratio of 1.24. The chart below compares the historical Sharpe Ratios of IUSF.L and IWSZ.L, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

IUSF.L vs. IWSZ.L - Drawdown Comparison

The maximum IUSF.L drawdown since its inception was -33.67%, which is greater than IWSZ.L's maximum drawdown of -30.21%. Use the drawdown chart below to compare losses from any high point for IUSF.L and IWSZ.L.

Drawdown Indicators

	IUSF.L	IWSZ.L	Difference
Max Drawdown Largest peak-to-trough decline	-33.67%	-30.21%	-3.46%
Max Drawdown (1Y) Largest decline over 1 year	-7.39%	-7.98%	+0.59%
Max Drawdown (3Y) Largest decline over 3 years	-22.73%	-14.95%	-7.78%
Max Drawdown (5Y) Largest decline over 5 years	-22.73%	-17.67%	-5.06%
Max Drawdown (10Y) Largest decline over 10 years	—	-30.21%	—
Current Drawdown Current decline from peak	-2.39%	-1.69%	-0.70%
Average Drawdown Average peak-to-trough decline	-5.38%	-4.71%	-0.67%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.43%	2.29%	+0.14%

Volatility

IUSF.L vs. IWSZ.L - Volatility Comparison

iShares Edge MSCI USA Size Factor UCITS ETF (IUSF.L) and iShares MSCI World Mid-Cap Equal Weight UCITS ETF (IWSZ.L) have volatilities of 3.65% and 3.59%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IUSF.L	IWSZ.L	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.65%	3.59%	+0.06%
Volatility (6M) Calculated over the trailing 6-month period	8.05%	10.26%	-2.21%
Volatility (1Y) Calculated over the trailing 1-year period	11.19%	12.20%	-1.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.99%	14.32%	+1.67%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.26%	15.44%	+1.82%

IUSF.L vs. IWSZ.L - Expense Ratio Comparison

IUSF.L has a 0.20% expense ratio, which is lower than IWSZ.L's 0.30% expense ratio.

Dividends

IUSF.L vs. IWSZ.L - Dividend Comparison

Neither IUSF.L nor IWSZ.L has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both IUSF.L and IWSZ.L in my portfolio?

IUSF.L and IWSZ.L have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, IUSF.L or IWSZ.L?

On fees, IUSF.L is cheaper at 0.20% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, IUSF.L or IWSZ.L?

IUSF.L is cheaper with a 0.20% expense ratio, compared with 0.30% for IWSZ.L.

What is the main difference between IUSF.L and IWSZ.L?

IUSF.L tracks Russell Mid Cap TR USD, while IWSZ.L tracks MSCI World Mid-Cap Equal Weighted Index. Their fees differ too: 0.20% for IUSF.L and 0.30% for IWSZ.L.