REW vs. XLK

Last updated Apr 2, 2026

Compare and contrast key facts about ProShares UltraShort Technology (REW) and State Street Technology Select Sector SPDR ETF (XLK).

REW and XLK are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. REW is a passively managed fund by ProShares that tracks the performance of the Dow Jones U.S. Technology Index (-200%). It was launched on Jan 30, 2007. XLK is a passively managed fund by State Street that tracks the performance of the S&P Technology Select Sector Daily Capped 35/20 Index. It was launched on Dec 16, 1998. Both REW and XLK 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

REW vs. XLK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares UltraShort Technology (REW) and State Street Technology Select Sector SPDR ETF (XLK). The values are adjusted to include any dividend payments, if applicable.

REW vs. XLK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
REW ProShares UltraShort Technology	10.53%	-43.15%	-33.70%	-61.35%	65.72%	-53.61%	-71.34%	-56.83%	-10.02%	-49.11%
XLK State Street Technology Select Sector SPDR ETF	-6.18%	24.61%	21.63%	56.02%	-27.73%	34.74%	43.62%	49.86%	-1.68%	34.26%

Returns By Period

In the year-to-date period, REW achieves a 10.53% return, which is significantly higher than XLK's -6.18% return. Over the past 10 years, REW has underperformed XLK with an annualized return of -40.72%, while XLK has yielded a comparatively higher 21.00% annualized return.

REW

• 1D: -3.28%
• 1M: 5.09%
• YTD: 10.53%
• 6M: 6.66%
• 1Y: -48.43%
• 3Y*: -36.26%
• 5Y*: -31.94%
• 10Y*: -40.72%

XLK

• 1D: 1.51%
• 1M: -3.20%
• YTD: -6.18%
• 6M: -4.94%
• 1Y: 30.47%
• 3Y*: 22.19%
• 5Y*: 15.65%
• 10Y*: 21.00%

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

REW vs. XLK - Expense Ratio Comparison

REW has a 0.95% expense ratio, which is higher than XLK's 0.08% expense ratio.

REW

ProShares UltraShort Technology

XLK

State Street Technology Select Sector SPDR ETF

Return for Risk

REW vs. XLK — Risk / Return Rank

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

REW

REW Risk / Return Rank: 2
REW Sharpe Ratio Rank: 1
REW Sortino Ratio Rank: 1
REW Omega Ratio Rank: 1
REW Calmar Ratio Rank: 2
REW Martin Ratio Rank: 5

XLK

XLK Risk / Return Rank: 65
XLK Sharpe Ratio Rank: 62
XLK Sortino Ratio Rank: 65
XLK Omega Ratio Rank: 63
XLK Calmar Ratio Rank: 73
XLK Martin Ratio Rank: 62

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.

REW vs. XLK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares UltraShort Technology (REW) and State Street Technology Select Sector SPDR ETF (XLK). 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.

	REW	XLK	Difference
Sharpe ratio Return per unit of total volatility	-0.90	1.13	-2.03
Sortino ratio Return per unit of downside risk	-1.26	1.71	-2.97
Omega ratio Gain probability vs. loss probability	0.83	1.24	-0.41
Calmar ratio Return relative to maximum drawdown	-0.73	1.97	-2.70
Martin ratio Return relative to average drawdown	-0.86	6.31	-7.17
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

REW vs. XLK - Sharpe Ratio Comparison

The current REW Sharpe Ratio is -0.90, which is lower than the XLK Sharpe Ratio of 1.13. The chart below compares the historical Sharpe Ratios of REW and XLK, 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

	REW	XLK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.90	1.13	-2.03
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.63	0.64	-1.26
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.84	0.87	-1.71
Sharpe Ratio (All Time) Calculated using the full available price history	-0.74	0.36	-1.10

Correlation

The correlation between REW and XLK is -0.94. This indicates that the assets' prices tend to move in opposite directions. Negative correlation can be particularly beneficial for diversification and risk management, as one asset may offset the losses of the other during market fluctuations.

Dividends

REW vs. XLK - Dividend Comparison

REW's dividend yield for the trailing twelve months is around 5.15%, more than XLK's 0.57% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
REW ProShares UltraShort Technology	5.15%	6.69%	5.68%	5.97%	0.65%	0.00%	0.27%	1.80%	0.51%	0.00%	0.00%	0.00%
XLK State Street Technology Select Sector SPDR ETF	0.57%	0.54%	0.66%	0.76%	1.04%	0.65%	0.92%	1.16%	1.60%	1.37%	1.74%	1.79%

Drawdowns

REW vs. XLK - Drawdown Comparison

The maximum REW drawdown since its inception was -99.99%, which is greater than XLK's maximum drawdown of -82.05%. Use the drawdown chart below to compare losses from any high point for REW and XLK.

Drawdown Indicators

	REW	XLK	Difference
Max Drawdown Largest peak-to-trough decline	-99.99%	-82.05%	-17.94%
Max Drawdown (1Y) Largest decline over 1 year	-67.44%	-15.92%	-51.52%
Max Drawdown (5Y) Largest decline over 5 years	-88.56%	-33.56%	-55.00%
Max Drawdown (10Y) Largest decline over 10 years	-99.62%	-33.56%	-66.06%
Current Drawdown Current decline from peak	-99.99%	-11.04%	-88.95%
Average Drawdown Average peak-to-trough decline	-86.76%	-35.17%	-51.59%
Ulcer Index Depth and duration of drawdowns from previous peaks	56.64%	4.98%	+51.66%

Volatility

REW vs. XLK - Volatility Comparison

ProShares UltraShort Technology (REW) has a higher volatility of 16.64% compared to State Street Technology Select Sector SPDR ETF (XLK) at 8.12%. This indicates that REW's price experiences larger fluctuations and is considered to be riskier than XLK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	REW	XLK	Difference
Volatility (1M) Calculated over the trailing 1-month period	16.64%	8.12%	+8.52%
Volatility (6M) Calculated over the trailing 6-month period	33.04%	16.49%	+16.55%
Volatility (1Y) Calculated over the trailing 1-year period	54.03%	27.05%	+26.98%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	51.29%	24.72%	+26.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	48.53%	24.33%	+24.20%