DAT vs. VOX

Last updated Jun 4, 2026

DAT (ProShares Big Data Refiners ETF) and VOX (Vanguard Communication Services ETF) are both Technology Equities funds - DAT tracks the FactSet Big Data Refiners Index while VOX tracks the MSCI US Investable Market Telecommunication Services 25/50 Index. Both are passively managed. Over the past 3 years, DAT returned 16.04%/yr vs 24.02%/yr for VOX. A 0.67 correlation means they provide meaningful diversification when combined. DAT charges 0.58%/yr vs 0.10%/yr for VOX.

Performance

DAT vs. VOX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares Big Data Refiners ETF (DAT) and Vanguard Communication Services ETF (VOX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, DAT achieves a -3.11% return, which is significantly lower than VOX's -1.38% return.

DAT

• 1D: -4.79%
• 1M: 16.04%
• YTD: -3.11%
• 6M: -3.15%
• 1Y: -3.73%
• 3Y*: 16.04%
• 5Y*: —
• 10Y*: —

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%

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

DAT vs. VOX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
DAT ProShares Big Data Refiners ETF	-3.11%	3.49%	33.22%	51.76%	-44.33%	-3.78%
VOX Vanguard Communication Services ETF	-1.38%	26.27%	33.12%	44.81%	-38.85%	-3.37%

Correlation

The correlation between DAT and VOX is 0.42, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.42
Correlation (3Y) Calculated over the trailing 3-year period	0.56
Correlation (All Time) Calculated using the full available price history since Oct 1, 2021	0.67

Over the past year, the correlation between DAT and VOX has dropped to 0.42 - well below their long-term average of 0.67, suggesting their price drivers have been diverging.

DAT vs. VOX - Sectors Allocation Comparison

Sectors	DAT	VOX
Technology	97.1%	1.2%
Communication Services	2.2%	98.4%
Utilities	1.2%	-
Healthcare	0.8%	0.0%
Basic Materials	-	-
Consumer Cyclical	-	0.2%
Consumer Defensive	-	-
Energy	-	-
Financial Services	-	-
Industrials	-	0.0%
Real Estate	-	0.1%

Return for Risk

DAT vs. VOX — Risk / Return Rank

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

DAT

DAT Risk / Return Rank: 8
DAT Sharpe Ratio Rank: 7
DAT Sortino Ratio Rank: 8
DAT Omega Ratio Rank: 8
DAT Calmar Ratio Rank: 8
DAT Martin Ratio Rank: 8

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

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.

DAT vs. VOX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares Big Data Refiners ETF (DAT) and Vanguard Communication Services ETF (VOX). 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.

	DAT	VOX	Difference
Sharpe ratio: Return per unit of total volatility	-0.13	1.34	-1.46
Sortino ratio: Return per unit of downside risk	0.03	2.00	-1.97
Omega ratio: Gain probability vs. loss probability	1.00	1.24	-0.23
Calmar ratio: Return relative to maximum drawdown	-0.11	1.52	-1.63
Martin ratio: Return relative to average drawdown	-0.25	5.83	-6.07
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

DAT vs. VOX - Sharpe Ratio Comparison

The current DAT Sharpe Ratio is -0.13, which is lower than the VOX Sharpe Ratio of 1.34. The chart below compares the historical Sharpe Ratios of DAT and VOX, 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

	DAT	VOX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.13	1.34	-1.46
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	0.05	0.43	-0.38

Drawdowns

DAT vs. VOX - Drawdown Comparison

The maximum DAT drawdown since its inception was -56.22%, roughly equal to the maximum VOX drawdown of -57.18%. Use the drawdown chart below to compare losses from any high point for DAT and VOX.

Drawdown Indicators

	DAT	VOX	Difference
Max Drawdown Largest peak-to-trough decline	-56.22%	-57.18%	+0.96%
Max Drawdown (1Y) Largest decline over 1 year	-34.70%	-13.56%	-21.14%
Max Drawdown (3Y) Largest decline over 3 years	-34.73%	-21.15%	-13.58%
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	-10.08%	-4.70%	-5.38%
Average Drawdown Average peak-to-trough decline	-26.23%	-11.91%	-14.32%
Ulcer Index Depth and duration of drawdowns from previous peaks	15.10%	3.54%	+11.56%

Volatility

DAT vs. VOX - Volatility Comparison

ProShares Big Data Refiners ETF (DAT) has a higher volatility of 13.55% compared to Vanguard Communication Services ETF (VOX) at 4.24%. This indicates that DAT's price experiences larger fluctuations and is considered to be riskier than VOX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	DAT	VOX	Difference
Volatility (1M) Calculated over the trailing 1-month period	13.55%	4.24%	+9.31%
Volatility (6M) Calculated over the trailing 6-month period	25.18%	11.16%	+14.02%
Volatility (1Y) Calculated over the trailing 1-year period	29.78%	15.45%	+14.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	34.02%	21.15%	+12.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	34.02%	20.89%	+13.13%

DAT vs. VOX - Expense Ratio Comparison

DAT has a 0.58% expense ratio, which is higher than VOX's 0.10% expense ratio.

Dividends

DAT vs. VOX - Dividend Comparison

DAT has not paid dividends to shareholders, while VOX's dividend yield for the trailing twelve months is around 1.00%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DAT ProShares Big Data Refiners 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%
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 DAT and VOX in my portfolio?

DAT and VOX have a correlation of 0.42, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, DAT or VOX?

DAT has higher volatility (13.55%) compared to VOX (4.24%). In terms of maximum drawdown, DAT dropped -56.22% vs VOX's -57.18%.

Which ETF is better, DAT or VOX?

On 3-year performance, VOX leads with 24.02% vs 16.04% for DAT. On fees, VOX is cheaper at 0.10% per year. On volatility, VOX has been the lower-risk option at 4.24%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, DAT or VOX?

Over the 3-year period, VOX has performed better with a 24.02% return vs 16.04%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, DAT or VOX?

VOX is cheaper with a 0.10% expense ratio, compared with 0.58% for DAT.

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

VOX has the higher dividend yield at 1.00%, compared with 0.00% for DAT.

What is the main difference between DAT and VOX?

DAT tracks FactSet Big Data Refiners Index, while VOX tracks MSCI US Investable Market Telecommunication Services 25/50 Index. They also come from different issuers: ProShares and Vanguard. Their fees differ too: 0.58% for DAT and 0.10% for VOX.

Which has better risk-adjusted returns?

VOX currently has the higher Sharpe Ratio (1.34 vs -0.13), 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.