IDUS.L vs. CSPX.AS

Last updated Apr 1, 2026

Compare and contrast key facts about iShares Core S&P 500 UCITS ETF USD Distributing (IDUS.L) and iShares Core S&P 500 UCITS ETF (CSPX.AS).

IDUS.L and CSPX.AS are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. IDUS.L is a passively managed fund by iShares that tracks the performance of the S&P 500. It was launched on Mar 15, 2002. CSPX.AS is a passively managed fund by iShares that tracks the performance of the S&P 500 Index. It was launched on May 19, 2010. Both IDUS.L and CSPX.AS are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

IDUS.L vs. CSPX.AS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Core S&P 500 UCITS ETF USD Distributing (IDUS.L) and iShares Core S&P 500 UCITS ETF (CSPX.AS). The values are adjusted to include any dividend payments, if applicable.

IDUS.L vs. CSPX.AS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IDUS.L iShares Core S&P 500 UCITS ETF USD Distributing	-6.36%	17.36%	25.31%	26.75%	-18.68%	29.32%	17.63%	30.58%	-5.51%	21.54%
CSPX.AS iShares Core S&P 500 UCITS ETF	-5.91%	17.97%	25.59%	26.14%	-19.39%	30.70%	17.25%	30.40%	-5.01%	22.28%

Different Trading Currencies

IDUS.L is traded in USD, while CSPX.AS is traded in EUR. To make them comparable, the CSPX.AS values have been converted to USD using the latest available exchange rates.

Returns By Period

In the year-to-date period, IDUS.L achieves a -6.36% return, which is significantly lower than CSPX.AS's -5.91% return. Both investments have delivered pretty close results over the past 10 years, with IDUS.L having a 13.59% annualized return and CSPX.AS not far ahead at 13.67%.

IDUS.L

• 1D: 0.55%
• 1M: -6.30%
• YTD: -6.36%
• 6M: -2.77%
• 1Y: 17.16%
• 3Y*: 17.72%
• 5Y*: 11.27%
• 10Y*: 13.59%

CSPX.AS

• 1D: 0.93%
• 1M: -5.84%
• YTD: -5.91%
• 6M: -2.27%
• 1Y: 17.59%
• 3Y*: 18.00%
• 5Y*: 11.35%
• 10Y*: 13.67%

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

IDUS.L vs. CSPX.AS - Expense Ratio Comparison

Both IDUS.L and CSPX.AS have an expense ratio of 0.07%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

IDUS.L

iShares Core S&P 500 UCITS ETF USD Distributing

CSPX.AS

iShares Core S&P 500 UCITS ETF

Return for Risk

IDUS.L vs. CSPX.AS — Risk / Return Rank

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

IDUS.L

IDUS.L Risk / Return Rank: 58
IDUS.L Sharpe Ratio Rank: 59
IDUS.L Sortino Ratio Rank: 59
IDUS.L Omega Ratio Rank: 60
IDUS.L Calmar Ratio Rank: 49
IDUS.L Martin Ratio Rank: 62

CSPX.AS

CSPX.AS Risk / Return Rank: 51
CSPX.AS Sharpe Ratio Rank: 33
CSPX.AS Sortino Ratio Rank: 32
CSPX.AS Omega Ratio Rank: 35
CSPX.AS Calmar Ratio Rank: 80
CSPX.AS Martin Ratio Rank: 74

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.

IDUS.L vs. CSPX.AS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Core S&P 500 UCITS ETF USD Distributing (IDUS.L) and iShares Core S&P 500 UCITS ETF (CSPX.AS). 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.

	IDUS.L	CSPX.AS	Difference
Sharpe ratio Return per unit of total volatility	1.07	1.03	+0.04
Sortino ratio Return per unit of downside risk	1.56	1.52	+0.04
Omega ratio Gain probability vs. loss probability	1.23	1.22	0.00
Calmar ratio Return relative to maximum drawdown	1.31	2.34	-1.04
Martin ratio Return relative to average drawdown	6.26	10.37	-4.11
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IDUS.L vs. CSPX.AS - Sharpe Ratio Comparison

The current IDUS.L Sharpe Ratio is 1.07, which is comparable to the CSPX.AS Sharpe Ratio of 1.03. The chart below compares the historical Sharpe Ratios of IDUS.L and CSPX.AS, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	IDUS.L	CSPX.AS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.07	1.03	+0.04
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.71	0.70	0.00
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.83	0.83	+0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.56	0.77	-0.20

Correlation

The correlation between IDUS.L and CSPX.AS is 0.90, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

IDUS.L vs. CSPX.AS - Dividend Comparison

IDUS.L's dividend yield for the trailing twelve months is around 1.01%, while CSPX.AS has not paid dividends to shareholders.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IDUS.L iShares Core S&P 500 UCITS ETF USD Distributing	1.01%	0.92%	1.02%	1.22%	1.44%	1.03%	1.32%	1.49%	1.74%	1.44%	1.42%	1.55%
CSPX.AS iShares Core S&P 500 UCITS ETF	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Drawdowns

IDUS.L vs. CSPX.AS - Drawdown Comparison

The maximum IDUS.L drawdown since its inception was -55.48%, which is greater than CSPX.AS's maximum drawdown of -34.12%. Use the drawdown chart below to compare losses from any high point for IDUS.L and CSPX.AS.

Drawdown Indicators

	IDUS.L	CSPX.AS	Difference
Max Drawdown Largest peak-to-trough decline	-55.48%	-33.65%	-21.83%
Max Drawdown (1Y) Largest decline over 1 year	-11.83%	-13.59%	+1.76%
Max Drawdown (5Y) Largest decline over 5 years	-24.38%	-23.37%	-1.01%
Max Drawdown (10Y) Largest decline over 10 years	-33.83%	-33.65%	-0.18%
Current Drawdown Current decline from peak	-7.67%	-6.75%	-0.92%
Average Drawdown Average peak-to-trough decline	-8.18%	-4.33%	-3.85%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.47%	2.04%	+0.43%

Volatility

IDUS.L vs. CSPX.AS - Volatility Comparison

iShares Core S&P 500 UCITS ETF USD Distributing (IDUS.L) has a higher volatility of 4.09% compared to iShares Core S&P 500 UCITS ETF (CSPX.AS) at 3.83%. This indicates that IDUS.L's price experiences larger fluctuations and is considered to be riskier than CSPX.AS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IDUS.L	CSPX.AS	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.09%	3.83%	+0.26%
Volatility (6M) Calculated over the trailing 6-month period	8.32%	8.33%	-0.01%
Volatility (1Y) Calculated over the trailing 1-year period	16.02%	16.88%	-0.86%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.95%	15.89%	+0.06%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.27%	16.29%	-0.02%