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CUKX.L vs. CUKS.L
Performance
Return for Risk
Drawdowns
Volatility
Dividends

CUKX.L vs. CUKS.L

Last updated Jun 5, 2026

CUKX.L (iShares FTSE 100 UCITS ETF) and CUKS.L (iShares MSCI UK Small Cap UCITS ETF (Acc)) are both exchange-traded funds - CUKX.L is a fund fund tracking the FTSE 100 Index, while CUKS.L is a Europe Equities fund tracking the FTSE Small Cap Ex Invest Trust TR GBP. Both are passively managed. Over the past 10 years, CUKX.L returned 9.06%/yr vs 4.74%/yr for CUKS.L. A 0.65 correlation means they provide meaningful diversification when combined. CUKX.L charges 0.07%/yr vs 0.58%/yr for CUKS.L.

Performance

CUKX.L vs. CUKS.L - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in iShares FTSE 100 UCITS ETF (CUKX.L) and iShares MSCI UK Small Cap UCITS ETF (Acc) (CUKS.L). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, CUKX.L achieves a 5.86% return, which is significantly higher than CUKS.L's 3.10% return. Over the past 10 years, CUKX.L has outperformed CUKS.L with an annualized return of 9.06%, while CUKS.L has yielded a comparatively lower 4.74% annualized return.

CUKX.L

1D
0.28%
1M
-0.66%
YTD
5.86%
6M
8.60%
1Y
21.37%
3Y*
14.63%
5Y*
11.72%
10Y*
9.06%

CUKS.L

1D
0.83%
1M
1.29%
YTD
3.10%
6M
5.42%
1Y
10.87%
3Y*
9.93%
5Y*
1.23%
10Y*
4.74%
*Multi-year figures are annualized to reflect compound growth (CAGR)

CUKX.L vs. CUKS.L - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
CUKX.L
iShares FTSE 100 UCITS ETF		5.86%25.78%9.30%7.72%4.97%17.48%-11.28%17.23%-9.05%12.45%
CUKS.L
iShares MSCI UK Small Cap UCITS ETF (Acc)		3.10%14.90%5.74%9.76%-22.81%14.33%-6.24%29.73%-15.36%20.13%

Correlation

The correlation between CUKX.L and CUKS.L is 0.67, 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

0.67

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

0.69

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

0.70

Correlation (10Y)
Calculated over the trailing 10-year period

0.71

Correlation (All Time)
Calculated using the full available price history since Sep 23, 2010

0.65

The correlation between CUKX.L and CUKS.L has been stable across timeframes, ranging from 0.65 to 0.71 - a consistent structural relationship.

CUKX.L vs. CUKS.L - Sectors Allocation Comparison

Sectors
CUKX.L
CUKS.L

Financial Services

25.0%
24.0%

Industrials

13.7%
21.1%

Healthcare

13.6%
3.3%

Consumer Defensive

13.2%
4.1%

Energy

11.3%
3.3%

Basic Materials

8.9%
6.6%

Utilities

5.1%
3.0%

Consumer Cyclical

5.0%
15.3%

Communication Services

2.6%
6.2%

Real Estate

0.9%
9.0%

Technology

0.8%
4.2%

Financial Services

CUKX.L
25.0%
CUKS.L
24.0%

Industrials

CUKX.L
13.7%
CUKS.L
21.1%

Healthcare

CUKX.L
13.6%
CUKS.L
3.3%

Consumer Defensive

CUKX.L
13.2%
CUKS.L
4.1%

Energy

CUKX.L
11.3%
CUKS.L
3.3%

Basic Materials

CUKX.L
8.9%
CUKS.L
6.6%

Utilities

CUKX.L
5.1%
CUKS.L
3.0%

Consumer Cyclical

CUKX.L
5.0%
CUKS.L
15.3%

Communication Services

CUKX.L
2.6%
CUKS.L
6.2%

Real Estate

CUKX.L
0.9%
CUKS.L
9.0%

Technology

CUKX.L
0.8%
CUKS.L
4.2%

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.

iShares FTSE 100 UCITS ETF

iShares MSCI UK Small Cap UCITS ETF (Acc)

Often compared with CUKX.L:
CUKX.L vs. VUKG.LCUKX.L vs. IUKD.LCUKX.L vs. FTAL.LCUKX.L vs. CSUK.LCUKX.L vs. VUKE.DECUKX.L vs. CPJ1.LCUKX.L vs. S100.L
Often compared with CUKS.L:
CUKS.L vs. VMIG.LCUKS.L vs. MIDD.LCUKS.L vs. IITU.LCUKS.L vs. AEICUKS.L vs. VUKG.LCUKS.L vs. AVUVCUKS.L vs. CNDX.L

Return for Risk

CUKX.L vs. CUKS.L — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
CUKX.L
CUKX.L Risk / Return Rank: 5656
Overall Rank
CUKX.L Sharpe Ratio Rank: 6060
Sharpe Ratio Rank
CUKX.L Sortino Ratio Rank: 5959
Sortino Ratio Rank
CUKX.L Omega Ratio Rank: 6262
Omega Ratio Rank
CUKX.L Calmar Ratio Rank: 5050
Calmar Ratio Rank
CUKX.L Martin Ratio Rank: 5050
Martin Ratio Rank
CUKS.L
CUKS.L Risk / Return Rank: 2222
Overall Rank
CUKS.L Sharpe Ratio Rank: 2323
Sharpe Ratio Rank
CUKS.L Sortino Ratio Rank: 2323
Sortino Ratio Rank
CUKS.L Omega Ratio Rank: 2323
Omega Ratio Rank
CUKS.L Calmar Ratio Rank: 2020
Calmar Ratio Rank
CUKS.L 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.

CUKX.L vs. CUKS.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares FTSE 100 UCITS ETF (CUKX.L) and iShares MSCI UK Small Cap UCITS ETF (Acc) (CUKS.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.

CUKX.LCUKS.LDifference
Sharpe ratioReturn per unit of total volatility
1.97
0.79

+1.18

Sortino ratioReturn per unit of downside risk
2.76
1.21

+1.55

Omega ratioGain probability vs. loss probability

1.37

1.15

+0.22

Calmar ratioReturn relative to maximum drawdown

2.41

0.86

+1.55

Martin ratioReturn relative to average drawdown

8.21

2.79

+5.42

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

CUKX.L vs. CUKS.L - Sharpe Ratio Comparison

The current CUKX.L Sharpe Ratio is 1.97, which is higher than the CUKS.L Sharpe Ratio of 0.79. The chart below compares the historical Sharpe Ratios of CUKX.L and CUKS.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.

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Sharpe Ratios by Period

CUKX.LCUKS.LDifference

Sharpe Ratio (1Y)

Calculated over the trailing 1-year period

1.97

0.79

+1.18

Sharpe Ratio (5Y)

Calculated over the trailing 5-year period

0.92

0.08

+0.84

Sharpe Ratio (10Y)

Calculated over the trailing 10-year period

0.60

0.28

+0.32

Sharpe Ratio (All Time)

Calculated using the full available price history

0.53

0.47

+0.06

Drawdowns

CUKX.L vs. CUKS.L - Drawdown Comparison

The maximum CUKX.L drawdown since its inception was -34.50%, smaller than the maximum CUKS.L drawdown of -42.42%. Use the drawdown chart below to compare losses from any high point for CUKX.L and CUKS.L.

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Drawdown Indicators

CUKX.LCUKS.LDifference

Max Drawdown

Largest peak-to-trough decline

-34.50%

-42.42%

+7.92%

Max Drawdown (1Y)

Largest decline over 1 year

-8.89%

-12.28%

+3.39%

Max Drawdown (3Y)

Largest decline over 3 years

-12.88%

-16.88%

+4.00%

Max Drawdown (5Y)

Largest decline over 5 years

-12.88%

-35.35%

+22.47%

Max Drawdown (10Y)

Largest decline over 10 years

-34.50%

-42.42%

+7.92%

Current Drawdown

Current decline from peak

-4.15%

-3.63%

-0.52%

Average Drawdown

Average peak-to-trough decline

-4.40%

-9.28%

+4.88%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.62%

3.80%

-1.18%

Volatility

CUKX.L vs. CUKS.L - Volatility Comparison

iShares FTSE 100 UCITS ETF (CUKX.L) and iShares MSCI UK Small Cap UCITS ETF (Acc) (CUKS.L) have volatilities of 4.08% and 4.14%, 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.

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Volatility by Period

CUKX.LCUKS.LDifference

Volatility (1M)

Calculated over the trailing 1-month period

4.08%

4.14%

-0.06%

Volatility (6M)

Calculated over the trailing 6-month period

9.48%

11.09%

-1.61%

Volatility (1Y)

Calculated over the trailing 1-year period

10.87%

13.40%

-2.53%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

12.71%

15.99%

-3.28%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

15.08%

17.02%

-1.94%

CUKX.L vs. CUKS.L - Expense Ratio Comparison

CUKX.L has a 0.07% expense ratio, which is lower than CUKS.L's 0.58% expense ratio.

Dividends

CUKX.L vs. CUKS.L - Dividend Comparison

Neither CUKX.L nor CUKS.L has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

CUKX.L and CUKS.L have a correlation of 0.67, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

On fees, CUKX.L is cheaper at 0.07% per year. The better choice depends on whether you care most about return, fees, risk, or income.

CUKX.L is cheaper with a 0.07% expense ratio, compared with 0.58% for CUKS.L.

CUKX.L tracks FTSE 100 Index, while CUKS.L tracks FTSE Small Cap Ex Invest Trust TR GBP. Their fees differ too: 0.07% for CUKX.L and 0.58% for CUKS.L.

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