CUKS.L vs. CS1.L

Last updated Jun 5, 2026

CUKS.L (iShares MSCI UK Small Cap UCITS ETF (Acc)) and CS1.L (Amundi ETF MSCI Spain UCITS ETF EUR (C)) are both Europe Equities funds - CUKS.L tracks the FTSE Small Cap Ex Invest Trust TR GBP while CS1.L tracks the BME IBEX 35 NR EUR. Both are passively managed. Over the past 10 years, CUKS.L returned 4.74%/yr vs 12.13%/yr for CS1.L. A 0.56 correlation means they provide meaningful diversification when combined. CUKS.L charges 0.58%/yr vs 0.25%/yr for CS1.L.

Performance

CUKS.L vs. CS1.L - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in iShares MSCI UK Small Cap UCITS ETF (Acc) (CUKS.L) and Amundi ETF MSCI Spain UCITS ETF EUR (C) (CS1.L). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CUKS.L achieves a 3.10% return, which is significantly lower than CS1.L's 6.29% return. Over the past 10 years, CUKS.L has underperformed CS1.L with an annualized return of 4.74%, while CS1.L has yielded a comparatively higher 12.13% annualized return.

CUKS.L

• 1D: 0.83%
• 1M: 3.18%
• YTD: 3.10%
• 6M: 5.37%
• 1Y: 10.62%
• 3Y*: 9.93%
• 5Y*: 1.23%
• 10Y*: 4.74%

CS1.L

• 1D: 0.91%
• 1M: 3.97%
• YTD: 6.29%
• 6M: 10.00%
• 1Y: 37.36%
• 3Y*: 30.04%
• 5Y*: 19.41%
• 10Y*: 12.13%

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

CUKS.L vs. CS1.L - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
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%
CS1.L Amundi ETF MSCI Spain UCITS ETF EUR (C)	6.29%	62.63%	14.12%	24.14%	4.89%	0.59%	-7.48%	8.06%	-11.27%	15.93%

Correlation

The correlation between CUKS.L and CS1.L is 0.58, 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	0.58
Correlation (3Y) Calculated over the trailing 3-year period	0.59
Correlation (5Y) Calculated over the trailing 5-year period	0.62
Correlation (10Y) Calculated over the trailing 10-year period	0.58
Correlation (All Time) Calculated using the full available price history since Dec 23, 2011	0.56

The correlation between CUKS.L and CS1.L has been stable across timeframes, ranging from 0.56 to 0.62 - a consistent structural relationship.

CUKS.L vs. CS1.L - Sectors Allocation Comparison

Sectors	CUKS.L	CS1.L
Financial Services	24.0%	40.3%
Industrials	21.1%	15.8%
Consumer Cyclical	15.3%	10.8%
Real Estate	9.0%	3.3%
Basic Materials	6.6%	1.3%
Communication Services	6.2%	2.4%
Technology	4.2%	3.2%
Consumer Defensive	4.1%	0.3%
Energy	3.3%	2.8%
Healthcare	3.3%	0.7%
Utilities	3.0%	19.0%

Return for Risk

CUKS.L vs. CS1.L — Risk / Return Rank

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

CUKS.L

CUKS.L Risk / Return Rank: 22
CUKS.L Sharpe Ratio Rank: 23
CUKS.L Sortino Ratio Rank: 23
CUKS.L Omega Ratio Rank: 23
CUKS.L Calmar Ratio Rank: 20
CUKS.L Martin Ratio Rank: 23

CS1.L

CS1.L Risk / Return Rank: 70
CS1.L Sharpe Ratio Rank: 72
CS1.L Sortino Ratio Rank: 68
CS1.L Omega Ratio Rank: 71
CS1.L Calmar Ratio Rank: 73
CS1.L Martin Ratio Rank: 67

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.

CUKS.L vs. CS1.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares MSCI UK Small Cap UCITS ETF (Acc) (CUKS.L) and Amundi ETF MSCI Spain UCITS ETF EUR (C) (CS1.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.

	CUKS.L	CS1.L	Difference
Sharpe ratio: Return per unit of total volatility	0.79	2.30	-1.51
Sortino ratio: Return per unit of downside risk	1.21	3.07	-1.86
Omega ratio: Gain probability vs. loss probability	1.15	1.42	-0.27
Calmar ratio: Return relative to maximum drawdown	0.86	3.60	-2.73
Martin ratio: Return relative to average drawdown	2.79	12.14	-9.35
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CUKS.L vs. CS1.L - Sharpe Ratio Comparison

The current CUKS.L Sharpe Ratio is 0.79, which is lower than the CS1.L Sharpe Ratio of 2.30. The chart below compares the historical Sharpe Ratios of CUKS.L and CS1.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.

Sharpe Ratios by Period

	CUKS.L	CS1.L	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.79	2.30	-1.51
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.08	1.16	-1.08
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.28	0.66	-0.38
Sharpe Ratio (All Time) Calculated using the full available price history	0.47	0.49	-0.01

Drawdowns

CUKS.L vs. CS1.L - Drawdown Comparison

The maximum CUKS.L drawdown since its inception was -42.42%, which is greater than CS1.L's maximum drawdown of -38.87%. Use the drawdown chart below to compare losses from any high point for CUKS.L and CS1.L.

Drawdown Indicators

	CUKS.L	CS1.L	Difference
Max Drawdown Largest peak-to-trough decline	-42.42%	-38.87%	-3.55%
Max Drawdown (1Y) Largest decline over 1 year	-12.28%	-10.34%	-1.94%
Max Drawdown (3Y) Largest decline over 3 years	-16.88%	-10.34%	-6.54%
Max Drawdown (5Y) Largest decline over 5 years	-35.35%	-18.82%	-16.53%
Max Drawdown (10Y) Largest decline over 10 years	-42.42%	-38.87%	-3.55%
Current Drawdown Current decline from peak	-3.63%	-0.98%	-2.65%
Average Drawdown Average peak-to-trough decline	-9.28%	-10.34%	+1.06%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.80%	3.07%	+0.73%

Volatility

CUKS.L vs. CS1.L - Volatility Comparison

The current volatility for iShares MSCI UK Small Cap UCITS ETF (Acc) (CUKS.L) is 4.14%, while Amundi ETF MSCI Spain UCITS ETF EUR (C) (CS1.L) has a volatility of 4.68%. This indicates that CUKS.L experiences smaller price fluctuations and is considered to be less risky than CS1.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CUKS.L	CS1.L	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.14%	4.68%	-0.54%
Volatility (6M) Calculated over the trailing 6-month period	11.09%	13.37%	-2.28%
Volatility (1Y) Calculated over the trailing 1-year period	13.40%	16.14%	-2.74%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.99%	16.72%	-0.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.02%	18.48%	-1.46%

CUKS.L vs. CS1.L - Expense Ratio Comparison

CUKS.L has a 0.58% expense ratio, which is higher than CS1.L's 0.25% expense ratio.

Dividends

CUKS.L vs. CS1.L - Dividend Comparison

Neither CUKS.L nor CS1.L has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both CUKS.L and CS1.L in my portfolio?

CUKS.L and CS1.L have a correlation of 0.58, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, CUKS.L or CS1.L?

On fees, CS1.L is cheaper at 0.25% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, CUKS.L or CS1.L?

CS1.L is cheaper with a 0.25% expense ratio, compared with 0.58% for CUKS.L.

What is the main difference between CUKS.L and CS1.L?

CUKS.L tracks FTSE Small Cap Ex Invest Trust TR GBP, while CS1.L tracks BME IBEX 35 NR EUR. They also come from different issuers: iShares and Amundi. Their fees differ too: 0.58% for CUKS.L and 0.25% for CS1.L.