SRS vs. REK

Last updated Jun 4, 2026

SRS (ProShares UltraShort Real Estate) and REK (ProShares Short Real Estate) are both REIT funds from ProShares - SRS tracks the Dow Jones U.S. Real Estate Index (-200%) while REK tracks the DJ Global United States (All) / Real Estate -SS (-100%). Both are passively managed. Over the past 10 years, SRS returned -16.52%/yr vs -6.20%/yr for REK. With a 0.96 correlation, they move nearly in lockstep. Both charge a 0.95% expense ratio.

Performance

SRS vs. REK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares UltraShort Real Estate (SRS) and ProShares Short Real Estate (REK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SRS achieves a -14.05% return, which is significantly lower than REK's -6.58% return. Over the past 10 years, SRS has underperformed REK with an annualized return of -16.52%, while REK has yielded a comparatively higher -6.20% annualized return.

SRS

• 1D: -0.27%
• 1M: 2.82%
• YTD: -14.05%
• 6M: -12.14%
• 1Y: -9.76%
• 3Y*: -12.75%
• 5Y*: -5.84%
• 10Y*: -16.52%

REK

• 1D: -0.49%
• 1M: 1.33%
• YTD: -6.58%
• 6M: -5.51%
• 1Y: -2.96%
• 3Y*: -3.69%
• 5Y*: -0.14%
• 10Y*: -6.20%

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

SRS vs. REK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SRS ProShares UltraShort Real Estate	-14.05%	-1.45%	-3.55%	-18.78%	54.68%	-52.22%	-33.05%	-38.97%	6.01%	-18.03%
REK ProShares Short Real Estate	-6.58%	2.35%	1.42%	-6.61%	29.17%	-30.58%	-11.33%	-20.96%	4.61%	-9.34%

Correlation

The correlation between SRS and REK is 0.99 - 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	0.99
Correlation (3Y) Calculated over the trailing 3-year period	0.99
Correlation (5Y) Calculated over the trailing 5-year period	0.99
Correlation (10Y) Calculated over the trailing 10-year period	0.98
Correlation (All Time) Calculated using the full available price history since Mar 19, 2010	0.96

The correlation between SRS and REK has been stable across timeframes, ranging from 0.96 to 0.99 - a consistent structural relationship.

SRS vs. REK - Sectors Allocation Comparison

Sectors	SRS	REK
Financial Services	71.8%	46.7%
Basic Materials	-	-
Communication Services	-	-
Consumer Cyclical	-	-
Consumer Defensive	-	-
Energy	-	-
Healthcare	-	-
Industrials	-	-
Real Estate	-	-
Technology	-	-
Utilities	-	-

Return for Risk

SRS vs. REK — Risk / Return Rank

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

SRS

SRS Risk / Return Rank: 5
SRS Sharpe Ratio Rank: 6
SRS Sortino Ratio Rank: 5
SRS Omega Ratio Rank: 5
SRS Calmar Ratio Rank: 5
SRS Martin Ratio Rank: 4

REK

REK Risk / Return Rank: 6
REK Sharpe Ratio Rank: 7
REK Sortino Ratio Rank: 6
REK Omega Ratio Rank: 6
REK Calmar Ratio Rank: 6
REK Martin Ratio Rank: 6

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.

SRS vs. REK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares UltraShort Real Estate (SRS) and ProShares Short Real Estate (REK). 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.

	SRS	REK	Difference
Sharpe ratio Return per unit of total volatility	-0.36	-0.22	-0.14
Sortino ratio Return per unit of downside risk	-0.36	-0.23	-0.13
Omega ratio Gain probability vs. loss probability	0.96	0.97	-0.01
Calmar ratio Return relative to maximum drawdown	-0.48	-0.29	-0.19
Martin ratio Return relative to average drawdown	-1.08	-0.67	-0.41
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SRS vs. REK - Sharpe Ratio Comparison

The current SRS Sharpe Ratio is -0.36, which is lower than the REK Sharpe Ratio of -0.22. The chart below compares the historical Sharpe Ratios of SRS and REK, 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

	SRS	REK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.36	-0.22	-0.14
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.16	-0.01	-0.15
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.41	-0.31	-0.10
Sharpe Ratio (All Time) Calculated using the full available price history	-0.50	-0.49	-0.01

Drawdowns

SRS vs. REK - Drawdown Comparison

The maximum SRS drawdown since its inception was -99.96%, which is greater than REK's maximum drawdown of -84.57%. Use the drawdown chart below to compare losses from any high point for SRS and REK.

Drawdown Indicators

	SRS	REK	Difference
Max Drawdown Largest peak-to-trough decline	-99.96%	-84.57%	-15.39%
Max Drawdown (1Y) Largest decline over 1 year	-20.53%	-10.23%	-10.30%
Max Drawdown (3Y) Largest decline over 3 years	-51.56%	-26.93%	-24.63%
Max Drawdown (5Y) Largest decline over 5 years	-51.56%	-26.93%	-24.63%
Max Drawdown (10Y) Largest decline over 10 years	-85.82%	-58.67%	-27.15%
Current Drawdown Current decline from peak	-99.96%	-81.95%	-18.01%
Average Drawdown Average peak-to-trough decline	-91.23%	-64.08%	-27.15%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.08%	4.42%	+4.66%

Volatility

SRS vs. REK - Volatility Comparison

ProShares UltraShort Real Estate (SRS) has a higher volatility of 7.58% compared to ProShares Short Real Estate (REK) at 3.91%. This indicates that SRS's price experiences larger fluctuations and is considered to be riskier than REK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SRS	REK	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.58%	3.91%	+3.67%
Volatility (6M) Calculated over the trailing 6-month period	19.34%	9.67%	+9.67%
Volatility (1Y) Calculated over the trailing 1-year period	27.06%	13.42%	+13.64%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	37.58%	18.86%	+18.72%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	40.67%	20.30%	+20.37%

SRS vs. REK - Expense Ratio Comparison

Both SRS and REK have an expense ratio of 0.95%.

Dividends

SRS vs. REK - Dividend Comparison

SRS's dividend yield for the trailing twelve months is around 3.67%, more than REK's 3.27% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
REK ProShares Short Real Estate	3.27%	3.43%	6.22%	4.50%	0.48%	0.00%	0.07%	1.28%	0.43%
SRS ProShares UltraShort Real Estate	3.67%	3.61%	6.06%	4.49%	0.30%	0.00%	0.19%	1.80%	0.47%

Frequently Asked Questions

Can I hold both SRS and REK in my portfolio?

With a correlation of 0.99, SRS and REK 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, SRS or REK?

SRS has higher volatility (7.58%) compared to REK (3.91%). In terms of maximum drawdown, SRS dropped -99.96% vs REK's -84.57%.

Which ETF is better, SRS or REK?

On 10-year performance, REK leads with -6.20% vs -16.52% for SRS. Both ETFs have the same 0.95% expense ratio. On volatility, REK has been the lower-risk option at 3.91%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, SRS or REK?

Over the 10-year period, REK has performed better with a -6.20% return vs -16.52%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, SRS or REK?

SRS and REK have the same expense ratio: 0.95% per year.

Which ETF pays a higher dividend yield, SRS or REK?

SRS has the higher dividend yield at 3.67%, compared with 3.27% for REK.

What is the main difference between SRS and REK?

SRS tracks Dow Jones U.S. Real Estate Index (-200%), while REK tracks DJ Global United States (All) / Real Estate -SS (-100%).

Which has better risk-adjusted returns?

REK currently has the higher Sharpe Ratio (-0.22 vs -0.36), 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.