VOO vs. CSPX.L

Last updated Apr 2, 2026

Compare and contrast key facts about Vanguard S&P 500 ETF (VOO) and iShares Core S&P 500 UCITS ETF USD (Acc) (CSPX.L).

VOO and CSPX.L are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. VOO is a passively managed fund by Vanguard that tracks the performance of the S&P 500 Index. It was launched on Sep 7, 2010. CSPX.L is a passively managed fund by BlackRock that tracks the performance of the S&P 500 Index. It was launched on May 18, 2010. Both VOO and CSPX.L 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

VOO vs. CSPX.L - Performance Comparison

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

VOO vs. CSPX.L - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VOO Vanguard S&P 500 ETF	-3.66%	17.82%	24.98%	26.32%	-18.17%	28.79%	18.32%	31.37%	-4.50%	21.77%
CSPX.L iShares Core S&P 500 UCITS ETF USD (Acc)	-4.10%	17.45%	25.25%	26.74%	-18.72%	29.35%	17.62%	30.55%	-5.46%	21.60%

Returns By Period

In the year-to-date period, VOO achieves a -3.66% return, which is significantly higher than CSPX.L's -4.10% return. Both investments have delivered pretty close results over the past 10 years, with VOO having a 14.14% annualized return and CSPX.L not far behind at 13.90%.

VOO

• 1D: 0.79%
• 1M: -4.29%
• YTD: -3.66%
• 6M: -1.41%
• 1Y: 18.17%
• 3Y*: 18.58%
• 5Y*: 11.93%
• 10Y*: 14.14%

CSPX.L

• 1D: 2.48%
• 1M: -3.68%
• YTD: -4.10%
• 6M: -0.96%
• 1Y: 18.28%
• 3Y*: 18.66%
• 5Y*: 11.79%
• 10Y*: 13.90%

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

VOO vs. CSPX.L - Expense Ratio Comparison

VOO has a 0.03% expense ratio, which is lower than CSPX.L's 0.07% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

CSPX.L

iShares Core S&P 500 UCITS ETF USD (Acc)

VOO

Vanguard S&P 500 ETF

Return for Risk

VOO vs. CSPX.L — Risk / Return Rank

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

VOO

VOO Risk / Return Rank: 60
VOO Sharpe Ratio Rank: 54
VOO Sortino Ratio Rank: 57
VOO Omega Ratio Rank: 61
VOO Calmar Ratio Rank: 59
VOO Martin Ratio Rank: 69

CSPX.L

CSPX.L Risk / Return Rank: 75
CSPX.L Sharpe Ratio Rank: 62
CSPX.L Sortino Ratio Rank: 61
CSPX.L Omega Ratio Rank: 63
CSPX.L Calmar Ratio Rank: 93
CSPX.L Martin Ratio Rank: 95

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.

VOO vs. CSPX.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard S&P 500 ETF (VOO) and iShares Core S&P 500 UCITS ETF USD (Acc) (CSPX.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.

	VOO	CSPX.L	Difference
Sharpe ratio Return per unit of total volatility	1.01	1.12	-0.12
Sortino ratio Return per unit of downside risk	1.53	1.64	-0.10
Omega ratio Gain probability vs. loss probability	1.23	1.24	-0.01
Calmar ratio Return relative to maximum drawdown	1.55	3.49	-1.94
Martin ratio Return relative to average drawdown	7.31	15.57	-8.26
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VOO vs. CSPX.L - Sharpe Ratio Comparison

The current VOO Sharpe Ratio is 1.01, which is comparable to the CSPX.L Sharpe Ratio of 1.12. The chart below compares the historical Sharpe Ratios of VOO and CSPX.L, 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

	VOO	CSPX.L	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.01	1.12	-0.12
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.71	0.74	-0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.79	0.86	-0.07
Sharpe Ratio (All Time) Calculated using the full available price history	0.83	0.88	-0.05

Correlation

The correlation between VOO and CSPX.L is 0.55, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

VOO vs. CSPX.L - Dividend Comparison

VOO's dividend yield for the trailing twelve months is around 1.18%, while CSPX.L has not paid dividends to shareholders.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VOO Vanguard S&P 500 ETF	1.18%	1.13%	1.24%	1.46%	1.69%	1.25%	1.54%	1.88%	2.06%	1.78%	2.02%	2.10%
CSPX.L iShares Core S&P 500 UCITS ETF USD (Acc)	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

VOO vs. CSPX.L - Drawdown Comparison

The maximum VOO drawdown since its inception was -33.99%, roughly equal to the maximum CSPX.L drawdown of -33.90%. Use the drawdown chart below to compare losses from any high point for VOO and CSPX.L.

Drawdown Indicators

	VOO	CSPX.L	Difference
Max Drawdown Largest peak-to-trough decline	-33.99%	-33.90%	-0.09%
Max Drawdown (1Y) Largest decline over 1 year	-11.98%	-11.83%	-0.15%
Max Drawdown (5Y) Largest decline over 5 years	-24.52%	-24.39%	-0.13%
Max Drawdown (10Y) Largest decline over 10 years	-33.99%	-33.90%	-0.09%
Current Drawdown Current decline from peak	-5.55%	-5.43%	-0.12%
Average Drawdown Average peak-to-trough decline	-3.72%	-3.76%	+0.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.55%	1.83%	+0.72%

Volatility

VOO vs. CSPX.L - Volatility Comparison

Vanguard S&P 500 ETF (VOO) has a higher volatility of 5.34% compared to iShares Core S&P 500 UCITS ETF USD (Acc) (CSPX.L) at 4.90%. This indicates that VOO's price experiences larger fluctuations and is considered to be riskier than CSPX.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VOO	CSPX.L	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.34%	4.90%	+0.44%
Volatility (6M) Calculated over the trailing 6-month period	9.47%	8.88%	+0.59%
Volatility (1Y) Calculated over the trailing 1-year period	18.11%	16.12%	+1.99%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.82%	15.95%	+0.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.99%	16.15%	+1.84%