PABU vs. VOO

Last updated Jun 4, 2026

PABU (iShares Paris-Aligned Climate Optimized MSCI USA ETF) and VOO (Vanguard S&P 500 ETF) are both exchange-traded funds - PABU is a Large Cap Blend Equities fund tracking the MSCI USA Climate Paris Aligned Benchmark Extended Select PAB Index (USD), while VOO is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. Over the past 3 years, PABU returned 20.14%/yr vs 22.44%/yr for VOO. Their correlation of 0.94 suggests significant overlap in exposure. PABU charges 0.10%/yr vs 0.03%/yr for VOO.

Performance

PABU vs. VOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Paris-Aligned Climate Optimized MSCI USA ETF (PABU) and Vanguard S&P 500 ETF (VOO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PABU achieves a 9.39% return, which is significantly lower than VOO's 10.91% return.

PABU

• 1D: -1.29%
• 1M: 7.47%
• YTD: 9.39%
• 6M: 9.10%
• 1Y: 23.78%
• 3Y*: 20.14%
• 5Y*: —
• 10Y*: —

VOO

• 1D: -0.70%
• 1M: 5.04%
• YTD: 10.91%
• 6M: 10.93%
• 1Y: 28.04%
• 3Y*: 22.44%
• 5Y*: 13.90%
• 10Y*: 15.56%

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

PABU vs. VOO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
PABU iShares Paris-Aligned Climate Optimized MSCI USA ETF	9.39%	13.08%	24.84%	29.51%	-15.45%
VOO Vanguard S&P 500 ETF	10.91%	17.82%	24.98%	26.32%	-11.78%

Correlation

The correlation between PABU and VOO is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.96
Correlation (3Y) Calculated over the trailing 3-year period	0.97
Correlation (All Time) Calculated using the full available price history since Feb 14, 2022	0.94

The correlation between PABU and VOO has been stable across timeframes, ranging from 0.94 to 0.97 - a consistent structural relationship.

PABU vs. VOO - Sectors Allocation Comparison

Sectors	PABU	VOO
Technology	44.9%	35.7%
Real Estate	12.4%	1.9%
Financial Services	11.2%	11.6%
Communication Services	10.4%	11.3%
Consumer Cyclical	9.0%	10.2%
Healthcare	7.4%	8.5%
Industrials	2.5%	8.3%
Utilities	1.8%	2.4%
Energy	0.7%	3.5%
Basic Materials	0.5%	1.8%
Consumer Defensive	-	4.9%

Return for Risk

PABU vs. VOO — Risk / Return Rank

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

PABU

PABU Risk / Return Rank: 46
PABU Sharpe Ratio Rank: 52
PABU Sortino Ratio Rank: 51
PABU Omega Ratio Rank: 50
PABU Calmar Ratio Rank: 36
PABU Martin Ratio Rank: 40

VOO

VOO Risk / Return Rank: 70
VOO Sharpe Ratio Rank: 71
VOO Sortino Ratio Rank: 70
VOO Omega Ratio Rank: 70
VOO Calmar Ratio Rank: 62
VOO Martin Ratio Rank: 75

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.

PABU vs. VOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Paris-Aligned Climate Optimized MSCI USA ETF (PABU) and Vanguard S&P 500 ETF (VOO). 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.

	PABU	VOO	Difference
Sharpe ratio: Return per unit of total volatility	1.79	2.39	-0.60
Sortino ratio: Return per unit of downside risk	2.48	3.25	-0.78
Omega ratio: Gain probability vs. loss probability	1.31	1.43	-0.12
Calmar ratio: Return relative to maximum drawdown	1.78	3.16	-1.38
Martin ratio: Return relative to average drawdown	6.25	14.73	-8.48
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PABU vs. VOO - Sharpe Ratio Comparison

The current PABU Sharpe Ratio is 1.79, which is comparable to the VOO Sharpe Ratio of 2.39. The chart below compares the historical Sharpe Ratios of PABU and VOO, 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

	PABU	VOO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.79	2.39	-0.60
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.83	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.87	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.73	0.89	-0.16

Drawdowns

PABU vs. VOO - Drawdown Comparison

The maximum PABU drawdown since its inception was -22.76%, smaller than the maximum VOO drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for PABU and VOO.

Drawdown Indicators

	PABU	VOO	Difference
Max Drawdown Largest peak-to-trough decline	-22.76%	-33.99%	+11.23%
Max Drawdown (1Y) Largest decline over 1 year	-13.40%	-8.90%	-4.50%
Max Drawdown (3Y) Largest decline over 3 years	-20.85%	-18.69%	-2.16%
Max Drawdown (5Y) Largest decline over 5 years	—	-24.52%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-33.99%	—
Current Drawdown Current decline from peak	-1.29%	-0.70%	-0.59%
Average Drawdown Average peak-to-trough decline	-5.63%	-3.69%	-1.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.82%	1.91%	+1.91%

Volatility

PABU vs. VOO - Volatility Comparison

iShares Paris-Aligned Climate Optimized MSCI USA ETF (PABU) has a higher volatility of 3.70% compared to Vanguard S&P 500 ETF (VOO) at 2.84%. This indicates that PABU's price experiences larger fluctuations and is considered to be riskier than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PABU	VOO	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.70%	2.84%	+0.86%
Volatility (6M) Calculated over the trailing 6-month period	10.24%	8.90%	+1.34%
Volatility (1Y) Calculated over the trailing 1-year period	13.37%	11.80%	+1.57%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.68%	16.81%	+1.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.68%	18.01%	+0.67%

PABU vs. VOO - Expense Ratio Comparison

PABU has a 0.10% expense ratio, which is higher than VOO's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

PABU vs. VOO - Dividend Comparison

PABU's dividend yield for the trailing twelve months is around 0.86%, less than VOO's 1.03% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PABU iShares Paris-Aligned Climate Optimized MSCI USA ETF	0.86%	0.90%	1.00%	1.06%	1.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
VOO Vanguard S&P 500 ETF	1.03%	1.13%	1.24%	1.46%	1.69%	1.25%	1.54%	1.88%	2.06%	1.78%	2.02%	2.10%

Frequently Asked Questions

Can I hold both PABU and VOO in my portfolio?

With a correlation of 0.95, PABU and VOO move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, PABU or VOO?

PABU has higher volatility (3.70%) compared to VOO (2.84%). In terms of maximum drawdown, PABU dropped -22.76% vs VOO's -33.99%.

Which ETF is better, PABU or VOO?

On 3-year performance, VOO leads with 22.44% vs 20.14% for PABU. On fees, VOO is cheaper at 0.03% per year. On volatility, VOO has been the lower-risk option at 2.84%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, PABU or VOO?

Over the 3-year period, VOO has performed better with a 22.44% return vs 20.14%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, PABU or VOO?

VOO is cheaper with a 0.03% expense ratio, compared with 0.10% for PABU.

Which ETF pays a higher dividend yield, PABU or VOO?

VOO has the higher dividend yield at 1.03%, compared with 0.86% for PABU.

What is the main difference between PABU and VOO?

PABU is categorized as Large Cap Blend Equities, while VOO is S&P 500. PABU tracks MSCI USA Climate Paris Aligned Benchmark Extended Select PAB Index (USD), while VOO tracks S&P 500 Index. They also come from different issuers: iShares and Vanguard. Their fees differ too: 0.10% for PABU and 0.03% for VOO.

Which has better risk-adjusted returns?

VOO currently has the higher Sharpe Ratio (2.39 vs 1.79), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.