WLDS.L vs. SSAC.L

Last updated Jun 14, 2026

WLDS.L (iShares MSCI World Small Cap UCITS ETF) and SSAC.L (iShares MSCI ACWI UCITS ETF (Acc)) are both exchange-traded funds - WLDS.L is a Small Cap Blend Equities fund tracking the MSCI World Small Cap Inde, while SSAC.L is a Global Equities fund tracking the MSCI ACWI Index. Both are passively managed. Over the past 5 years, WLDS.L returned 8.13%/yr vs 12.18%/yr for SSAC.L. Their correlation of 0.85 suggests significant overlap in exposure. WLDS.L charges 0.35%/yr vs 0.20%/yr for SSAC.L.

Performance

WLDS.L vs. SSAC.L - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in iShares MSCI World Small Cap UCITS ETF (WLDS.L) and iShares MSCI ACWI UCITS ETF (Acc) (SSAC.L). The values are adjusted to include any dividend payments, if applicable.

Different Trading Currencies

WLDS.L is traded in GBP, while SSAC.L is traded in GBp. To make them comparable, the SSAC.L values have been converted to GBP using the latest available exchange rates.

Returns By Period

In the year-to-date period, WLDS.L achieves a 15.41% return, which is significantly higher than SSAC.L's 10.60% return.

WLDS.L

• 1D: 2.23%
• 1M: 3.04%
• YTD: 15.41%
• 6M: 14.39%
• 1Y: 34.08%
• 3Y*: 14.50%
• 5Y*: 8.13%
• 10Y*: —

SSAC.L

• 1D: 1.72%
• 1M: 0.47%
• YTD: 10.60%
• 6M: 11.34%
• 1Y: 28.26%
• 3Y*: 17.41%
• 5Y*: 12.18%
• 10Y*: 13.49%

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

WLDS.L vs. SSAC.L - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
WLDS.L iShares MSCI World Small Cap UCITS ETF	15.41%	11.75%	8.63%	11.26%	-8.89%	16.71%	12.54%	20.41%	-31.05%
SSAC.L iShares MSCI ACWI UCITS ETF (Acc)	10.60%	13.95%	19.63%	16.14%	-8.56%	20.35%	11.80%	22.09%	3.00%

Correlation

The correlation between WLDS.L and SSAC.L is 0.81, 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	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.80
Correlation (5Y) Calculated over the trailing 5-year period	0.84
Correlation (All Time) Calculated using the full available price history since Mar 27, 2018	0.85

The correlation between WLDS.L and SSAC.L has been stable across timeframes, ranging from 0.80 to 0.85 - a consistent structural relationship.

WLDS.L vs. SSAC.L - Sectors Allocation Comparison

Sectors	WLDS.L	SSAC.L
Industrials	19.7%	10.3%
Technology	16.0%	33.7%
Financial Services	13.2%	15.3%
Consumer Cyclical	10.6%	8.8%
Healthcare	10.0%	7.6%
Real Estate	8.0%	1.6%
Basic Materials	8.0%	3.7%
Energy	4.8%	3.9%
Consumer Defensive	3.8%	4.5%
Communication Services	3.2%	8.3%
Utilities	2.7%	2.4%

Return for Risk

WLDS.L vs. SSAC.L — Risk / Return Rank

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

WLDS.L

WLDS.L Risk / Return Rank: 87
WLDS.L Sharpe Ratio Rank: 89
WLDS.L Sortino Ratio Rank: 90
WLDS.L Omega Ratio Rank: 86
WLDS.L Calmar Ratio Rank: 86
WLDS.L Martin Ratio Rank: 86

SSAC.L

SSAC.L Risk / Return Rank: 87
SSAC.L Sharpe Ratio Rank: 88
SSAC.L Sortino Ratio Rank: 88
SSAC.L Omega Ratio Rank: 88
SSAC.L Calmar Ratio Rank: 83
SSAC.L 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.

WLDS.L vs. SSAC.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares MSCI World Small Cap UCITS ETF (WLDS.L) and iShares MSCI ACWI UCITS ETF (Acc) (SSAC.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.

	WLDS.L	SSAC.L	Difference
Sharpe ratio: Return per unit of total volatility	2.58	2.54	+0.04
Sortino ratio: Return per unit of downside risk	3.66	3.50	+0.15
Omega ratio: Gain probability vs. loss probability	1.46	1.48	-0.02
Calmar ratio: Return relative to maximum drawdown	4.23	3.90	+0.33
Martin ratio: Return relative to average drawdown	15.95	15.39	+0.56

WLDS.L vs. SSAC.L - Sharpe Ratio Comparison

The current WLDS.L Sharpe Ratio is 2.58, which is comparable to the SSAC.L Sharpe Ratio of 2.54. The chart below compares the historical Sharpe Ratios of WLDS.L and SSAC.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

WLDS.L vs. SSAC.L - Drawdown Comparison

The maximum WLDS.L drawdown since its inception was -43.18%, roughly equal to the maximum SSAC.L drawdown of -43.12%. Use the drawdown chart below to compare losses from any high point for WLDS.L and SSAC.L.

Drawdown Indicators

	WLDS.L	SSAC.L	Difference
Max Drawdown Largest peak-to-trough decline	-43.18%	-43.12%	-0.06%
Max Drawdown (1Y) Largest decline over 1 year	-7.86%	-7.01%	-0.85%
Max Drawdown (3Y) Largest decline over 3 years	-21.53%	-20.01%	-1.52%
Max Drawdown (5Y) Largest decline over 5 years	-21.53%	-20.01%	-1.52%
Max Drawdown (10Y) Largest decline over 10 years	—	-25.43%	—
Current Drawdown Current decline from peak	0.00%	-1.51%	+1.51%
Average Drawdown Average peak-to-trough decline	-12.28%	-9.20%	-3.08%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.09%	1.78%	+0.31%

Volatility

WLDS.L vs. SSAC.L - Volatility Comparison

iShares MSCI World Small Cap UCITS ETF (WLDS.L) has a higher volatility of 4.13% compared to iShares MSCI ACWI UCITS ETF (Acc) (SSAC.L) at 3.56%. This indicates that WLDS.L's price experiences larger fluctuations and is considered to be riskier than SSAC.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WLDS.L	SSAC.L	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.13%	3.56%	+0.57%
Volatility (6M) Calculated over the trailing 6-month period	9.74%	8.12%	+1.62%
Volatility (1Y) Calculated over the trailing 1-year period	12.93%	10.80%	+2.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.30%	18.93%	+1.37%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.45%	17.28%	+5.17%

WLDS.L vs. SSAC.L - Expense Ratio Comparison

WLDS.L has a 0.35% expense ratio, which is higher than SSAC.L's 0.20% expense ratio.

Dividends

WLDS.L vs. SSAC.L - Dividend Comparison

Neither WLDS.L nor SSAC.L has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both WLDS.L and SSAC.L in my portfolio?

WLDS.L and SSAC.L have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, WLDS.L or SSAC.L?

On fees, SSAC.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, WLDS.L or SSAC.L?

SSAC.L is cheaper with a 0.20% expense ratio, compared with 0.35% for WLDS.L.

What is the main difference between WLDS.L and SSAC.L?

WLDS.L is categorized as Small Cap Blend Equities, while SSAC.L is Global Equities. WLDS.L tracks MSCI World Small Cap Inde, while SSAC.L tracks MSCI ACWI Index. Their fees differ too: 0.35% for WLDS.L and 0.20% for SSAC.L.