VOX vs. PABU

Last updated Jun 4, 2026

VOX (Vanguard Communication Services ETF) and PABU (iShares Paris-Aligned Climate Optimized MSCI USA ETF) are both exchange-traded funds - VOX is a Technology Equities fund tracking the MSCI US Investable Market Telecommunication Services 25/50 Index, while PABU is a Large Cap Blend Equities fund tracking the MSCI USA Climate Paris Aligned Benchmark Extended Select PAB Index (USD). Both are passively managed. Over the past 3 years, VOX returned 24.02%/yr vs 20.14%/yr for PABU. A 0.78 correlation means they provide meaningful diversification when combined. Both charge a 0.10% expense ratio.

Performance

VOX vs. PABU - Performance Comparison

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

Returns By Period

In the year-to-date period, VOX achieves a -1.38% return, which is significantly lower than PABU's 9.39% return.

VOX

• 1D: -0.84%
• 1M: -2.77%
• YTD: -1.38%
• 6M: 0.47%
• 1Y: 20.55%
• 3Y*: 24.02%
• 5Y*: 7.58%
• 10Y*: 9.30%

PABU

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

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

VOX vs. PABU - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
VOX Vanguard Communication Services ETF	-1.38%	26.27%	33.12%	44.81%	-31.69%
PABU iShares Paris-Aligned Climate Optimized MSCI USA ETF	9.39%	13.08%	24.84%	29.51%	-15.45%

Correlation

The correlation between VOX and PABU is 0.68, 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	0.68
Correlation (3Y) Calculated over the trailing 3-year period	0.75
Correlation (All Time) Calculated using the full available price history since Feb 14, 2022	0.78

The correlation between VOX and PABU shifts across timeframes, from 0.68 (1 year) to 0.78 (all time), reflecting how their relationship changes across market environments.

VOX vs. PABU - Sectors Allocation Comparison

Sectors	VOX	PABU
Communication Services	98.4%	10.4%
Technology	1.2%	44.9%
Consumer Cyclical	0.2%	9.0%
Real Estate	0.1%	12.4%
Industrials	0.0%	2.5%
Healthcare	0.0%	7.4%
Basic Materials	-	0.5%
Consumer Defensive	-	-
Energy	-	0.7%
Financial Services	-	11.2%
Utilities	-	1.8%

Return for Risk

VOX vs. PABU — Risk / Return Rank

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

VOX

VOX Risk / Return Rank: 35
VOX Sharpe Ratio Rank: 36
VOX Sortino Ratio Rank: 38
VOX Omega Ratio Rank: 35
VOX Calmar Ratio Rank: 30
VOX Martin Ratio Rank: 37

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

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.

VOX vs. PABU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Communication Services ETF (VOX) and iShares Paris-Aligned Climate Optimized MSCI USA ETF (PABU). 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.

	VOX	PABU	Difference
Sharpe ratio: Return per unit of total volatility	1.34	1.79	-0.45
Sortino ratio: Return per unit of downside risk	2.00	2.48	-0.48
Omega ratio: Gain probability vs. loss probability	1.24	1.31	-0.08
Calmar ratio: Return relative to maximum drawdown	1.52	1.78	-0.26
Martin ratio: Return relative to average drawdown	5.83	6.25	-0.42
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VOX vs. PABU - Sharpe Ratio Comparison

The current VOX Sharpe Ratio is 1.34, which is comparable to the PABU Sharpe Ratio of 1.79. The chart below compares the historical Sharpe Ratios of VOX and PABU, 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

	VOX	PABU	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.34	1.79	-0.45
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.36	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.45	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.73	-0.29

Drawdowns

VOX vs. PABU - Drawdown Comparison

The maximum VOX drawdown since its inception was -57.18%, which is greater than PABU's maximum drawdown of -22.76%. Use the drawdown chart below to compare losses from any high point for VOX and PABU.

Drawdown Indicators

	VOX	PABU	Difference
Max Drawdown Largest peak-to-trough decline	-57.18%	-22.76%	-34.42%
Max Drawdown (1Y) Largest decline over 1 year	-13.56%	-13.40%	-0.16%
Max Drawdown (3Y) Largest decline over 3 years	-21.15%	-20.85%	-0.30%
Max Drawdown (5Y) Largest decline over 5 years	-46.76%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-46.76%	—	—
Current Drawdown Current decline from peak	-4.70%	-1.29%	-3.41%
Average Drawdown Average peak-to-trough decline	-11.91%	-5.63%	-6.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.54%	3.82%	-0.28%

Volatility

VOX vs. PABU - Volatility Comparison

Vanguard Communication Services ETF (VOX) has a higher volatility of 4.24% compared to iShares Paris-Aligned Climate Optimized MSCI USA ETF (PABU) at 3.70%. This indicates that VOX's price experiences larger fluctuations and is considered to be riskier than PABU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VOX	PABU	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.24%	3.70%	+0.54%
Volatility (6M) Calculated over the trailing 6-month period	11.16%	10.24%	+0.92%
Volatility (1Y) Calculated over the trailing 1-year period	15.45%	13.37%	+2.08%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.15%	18.68%	+2.47%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.89%	18.68%	+2.21%

VOX vs. PABU - Expense Ratio Comparison

Both VOX and PABU have an expense ratio of 0.10%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

VOX vs. PABU - Dividend Comparison

VOX's dividend yield for the trailing twelve months is around 1.00%, more than PABU's 0.86% 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%
VOX Vanguard Communication Services ETF	1.00%	0.95%	1.05%	1.03%	0.88%	0.93%	0.73%	0.90%	2.77%	3.83%	2.67%	3.55%

Frequently Asked Questions

Can I hold both VOX and PABU in my portfolio?

VOX and PABU have a correlation of 0.68, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VOX or PABU?

VOX has higher volatility (4.24%) compared to PABU (3.70%). In terms of maximum drawdown, VOX dropped -57.18% vs PABU's -22.76%.

Which ETF is better, VOX or PABU?

On 3-year performance, VOX leads with 24.02% vs 20.14% for PABU. Both ETFs have the same 0.10% expense ratio. On volatility, PABU has been the lower-risk option at 3.70%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, VOX or PABU?

Over the 3-year period, VOX has performed better with a 24.02% return vs 20.14%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, VOX or PABU?

VOX and PABU have the same expense ratio: 0.10% per year.

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

VOX has the higher dividend yield at 1.00%, compared with 0.86% for PABU.

What is the main difference between VOX and PABU?

VOX is categorized as Technology Equities, while PABU is Large Cap Blend Equities. VOX tracks MSCI US Investable Market Telecommunication Services 25/50 Index, while PABU tracks MSCI USA Climate Paris Aligned Benchmark Extended Select PAB Index (USD). They also come from different issuers: Vanguard and iShares.

Which has better risk-adjusted returns?

PABU currently has the higher Sharpe Ratio (1.79 vs 1.34), 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.