DAT vs. SPY

Last updated Aug 4, 2026

DAT (ProShares Big Data Refiners ETF) and SPY (State Street SPDR S&P 500 ETF) are both exchange-traded funds - DAT is a Technology Equities fund tracking the FactSet Big Data Refiners Index, while SPY is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. Over the past 3 years, DAT returned 16.50%/yr vs 20.74%/yr for SPY. Their 0.69 correlation means they have sometimes moved together and sometimes differently. DAT charges 0.58%/yr vs 0.09%/yr for SPY.

Performance

DAT vs. SPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares Big Data Refiners ETF (DAT) and State Street SPDR S&P 500 ETF (SPY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, DAT achieves a 0.98% return, which is significantly lower than SPY's 11.70% return.

DAT

• 1D: 2.36%
• 1M: 4.47%
• 6M: 17.59%
• YTD: 0.98%
• 1Y: 2.54%
• 3Y*: 16.50%
• 5Y*: —
• 10Y*: —
• ALL TIME*: 2.44%

SPY

• 1D: 1.42%
• 1M: 1.73%
• 6M: 9.53%
• YTD: 11.70%
• 1Y: 23.22%
• 3Y*: 20.74%
• 5Y*: 13.05%
• 10Y*: 15.09%
• ALL TIME*: 10.83%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
DAT ProShares Big Data Refiners ETF	$133.50K	$98.36K	$106.75K
SPY State Street SPDR S&P 500 ETF	$38.19B	$36.17B	$39.59B

DAT vs. SPY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
DAT ProShares Big Data Refiners ETF	0.98%	3.49%	33.22%	51.76%	-44.33%	-4.44%
SPY State Street SPDR S&P 500 ETF	11.70%	17.72%	24.89%	26.18%	-18.18%	9.71%

Correlation

The correlation between DAT and SPY is 0.46, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.46
Correlation (3Y) Balances recent behavior with more history.	0.62
Correlation (All Time) Calculated using the full available price history since Sep 30, 2021	0.69

Over the past year, the correlation between DAT and SPY has dropped to 0.46 - well below their long-term average of 0.69, suggesting their price drivers have been diverging.

DAT vs. SPY - Sectors Allocation Comparison

Sectors	DAT	SPY
Technology	90.0%	36.9%
Communication Services	4.3%	9.7%
Utilities	1.4%	2.6%
Healthcare	0.7%	9.4%
Basic Materials	-	1.9%
Consumer Cyclical	-	8.9%
Consumer Defensive	-	4.8%
Energy	-	3.4%
Financial Services	-	12.5%
Industrials	-	7.6%
Real Estate	-	2.0%

Return for Risk

DAT vs. SPY — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

DAT

DAT Risk / Return Rank: 13
DAT Sharpe Ratio Rank: 13
DAT Sortino Ratio Rank: 14
DAT Omega Ratio Rank: 13
DAT Calmar Ratio Rank: 12
DAT Martin Ratio Rank: 12

SPY

SPY Risk / Return Rank: 78
SPY Sharpe Ratio Rank: 78
SPY Sortino Ratio Rank: 77
SPY Omega Ratio Rank: 77
SPY Calmar Ratio Rank: 74
SPY Martin Ratio Rank: 83

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

DAT vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares Big Data Refiners ETF (DAT) and State Street SPDR S&P 500 ETF (SPY). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	DAT	SPY	Difference
Sharpe ratio: Return per unit of total volatility	0.08	1.82	-1.74
Sortino ratio: Return per unit of downside risk	0.35	2.50	-2.16
Omega ratio: Gain probability vs. loss probability	1.04	1.32	-0.28
Calmar ratio: Return relative to maximum drawdown	0.07	2.62	-2.55
Martin ratio: Return relative to average drawdown	0.16	11.20	-11.03

DAT vs. SPY - Sharpe Ratio Comparison

The current DAT Sharpe Ratio is 0.08, which is lower than the SPY Sharpe Ratio of 1.82. The chart below compares the historical Sharpe Ratios of DAT and SPY, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

DAT vs. SPY - Drawdown Comparison

The maximum DAT drawdown since its inception was -56.22%, roughly equal to the maximum SPY drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for DAT and SPY.

Drawdown Indicators

	DAT	SPY	Difference
Max Drawdown Largest peak-to-trough decline	-56.22%	-55.19%	-1.03%
Max Drawdown (1Y) Largest decline over 1 year	-34.70%	-8.88%	-25.82%
Max Drawdown (3Y) Largest decline over 3 years	-34.73%	-18.76%	-15.97%
Max Drawdown (5Y) Largest decline over 5 years	—	-24.50%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-33.72%	—
Current Drawdown Current decline from peak	-6.28%	0.00%	-6.28%
Average Drawdown Average peak-to-trough decline	-25.75%	-9.01%	-16.74%
Ulcer Index Depth and duration of drawdowns from previous peaks	15.88%	2.08%	+13.80%

Volatility

DAT vs. SPY - Volatility Comparison

ProShares Big Data Refiners ETF (DAT) has a higher volatility of 8.69% compared to State Street SPDR S&P 500 ETF (SPY) at 3.84%. This indicates that DAT's price experiences larger fluctuations and is considered to be riskier than SPY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	DAT	SPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.69%	3.84%	+4.85%
Volatility (6M) Calculated over the trailing 6-month period	26.49%	10.23%	+16.26%
Volatility (1Y) Calculated over the trailing 1-year period	31.52%	12.87%	+18.65%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	33.94%	17.19%	+16.75%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	33.94%	17.96%	+15.98%

DAT vs. SPY - Expense Ratio Comparison

DAT has a 0.58% expense ratio, which is higher than SPY's 0.09% expense ratio.

Dividends

DAT vs. SPY - Dividend Comparison

DAT has not paid dividends to shareholders, while SPY's dividend yield for the trailing twelve months is around 0.99%.

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%
SPY State Street SPDR S&P 500 ETF	0.99%	1.07%	1.21%	1.40%	1.65%	1.20%	1.52%	1.75%	2.04%	1.80%	2.03%	2.06%

Frequently Asked Questions

Can I hold both DAT and SPY in my portfolio?

DAT and SPY have a correlation of 0.46, 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 SPY?

DAT has higher volatility (8.69%) compared to SPY (3.84%). In terms of maximum drawdown, DAT dropped -56.22% vs SPY's -55.19%.

Which ETF is better, DAT or SPY?

On 3-year performance, SPY leads with 20.74% vs 16.50% for DAT. On fees, SPY is cheaper at 0.09% per year. On volatility, SPY has been the lower-risk option at 3.84%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, DAT or SPY?

Over the 3-year period, SPY has performed better with a 20.74% return vs 16.50%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, DAT or SPY?

SPY is cheaper with a 0.09% expense ratio, compared with 0.58% for DAT.

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

SPY has the higher dividend yield at 0.99%, compared with 0.00% for DAT.

What is the main difference between DAT and SPY?

DAT is categorized as Technology Equities, while SPY is S&P 500. DAT tracks FactSet Big Data Refiners Index, while SPY tracks S&P 500 Index. They also come from different issuers: ProShares and State Street. Their fees differ too: 0.58% for DAT and 0.09% for SPY.

Which has better risk-adjusted returns?

SPY currently has the higher Sharpe Ratio (1.82 vs 0.08), 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.