PDM vs. SPXU

Last updated Jul 17, 2026

PDM (Piedmont Office Realty Trust, Inc.) is a stock, while SPXU (ProShares UltraPro Short S&P500) is S&P 500 fund tracking the S&P 500 Index (-300%). Over the past 10 years, PDM returned -2.53%/yr vs -41.20%/yr for SPXU. At a correlation of -0.48, they often move in opposite directions.

Performance

PDM vs. SPXU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Piedmont Office Realty Trust, Inc. (PDM) and ProShares UltraPro Short S&P500 (SPXU). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PDM achieves a 18.47% return, which is significantly higher than SPXU's -25.00% return. Over the past 10 years, PDM has outperformed SPXU with an annualized return of -2.53%, while SPXU has yielded a comparatively lower -41.20% annualized return.

PDM

• 1D: 2.07%
• 1M: 7.27%
• 6M: 12.91%
• YTD: 18.47%
• 1Y: 32.62%
• 3Y*: 12.84%
• 5Y*: -7.61%
• 10Y*: -2.53%

SPXU

• 1D: 1.61%
• 1M: -0.30%
• 6M: -21.86%
• YTD: -25.00%
• 1Y: -41.21%
• 3Y*: -39.91%
• 5Y*: -33.74%
• 10Y*: -41.20%

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

PDM vs. SPXU - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PDM Piedmont Office Realty Trust, Inc.	18.47%	-7.26%	37.18%	-14.77%	-46.76%	19.86%	-23.46%	35.96%	-9.09%	0.14%
SPXU ProShares UltraPro Short S&P500	-25.00%	-41.73%	-43.31%	-46.02%	36.05%	-57.94%	-70.39%	-56.27%	3.97%	-44.23%

Correlation

The correlation between PDM and SPXU is -0.23, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.23
Correlation (3Y) Calculated over the trailing 3-year period	-0.40
Correlation (5Y) Calculated over the trailing 5-year period	-0.47
Correlation (10Y) Calculated over the trailing 10-year period	-0.45
Correlation (All Time) Calculated using the full available price history since Feb 10, 2010	-0.48

Over the past year, the inverse relationship between PDM and SPXU has weakened: their correlation has moved from -0.48 to -0.23, meaning they move in opposite directions less often than they have historically.

Return for Risk

PDM vs. SPXU — Risk / Return Rank

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

PDM

PDM Risk / Return Rank: 71
PDM Sharpe Ratio Rank: 76
PDM Sortino Ratio Rank: 70
PDM Omega Ratio Rank: 69
PDM Calmar Ratio Rank: 67
PDM Martin Ratio Rank: 71

SPXU

SPXU Risk / Return Rank: 1
SPXU Sharpe Ratio Rank: 1
SPXU Sortino Ratio Rank: 1
SPXU Omega Ratio Rank: 1
SPXU Calmar Ratio Rank: 1
SPXU Martin Ratio Rank: 0

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.

PDM vs. SPXU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Piedmont Office Realty Trust, Inc. (PDM) and ProShares UltraPro Short S&P500 (SPXU). 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.

	PDM	SPXU	Difference
Sharpe ratio: Return per unit of total volatility	1.03	-1.10	+2.13
Sortino ratio: Return per unit of downside risk	1.53	-1.71	+3.23
Omega ratio: Gain probability vs. loss probability	1.19	0.81	+0.38
Calmar ratio: Return relative to maximum drawdown	1.11	-0.94	+2.05
Martin ratio: Return relative to average drawdown	2.98	-1.61	+4.59

PDM vs. SPXU - Sharpe Ratio Comparison

The current PDM Sharpe Ratio is 1.03, which is higher than the SPXU Sharpe Ratio of -1.10. The chart below compares the historical Sharpe Ratios of PDM and SPXU, 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

PDM vs. SPXU - Drawdown Comparison

The maximum PDM drawdown since its inception was -73.72%, smaller than the maximum SPXU drawdown of -99.99%. Use the drawdown chart below to compare losses from any high point for PDM and SPXU.

Drawdown Indicators

	PDM	SPXU	Difference
Max Drawdown Largest peak-to-trough decline	-73.72%	-99.99%	+26.27%
Max Drawdown (1Y) Largest decline over 1 year	-29.47%	-43.83%	+14.36%
Max Drawdown (3Y) Largest decline over 3 years	-46.45%	-84.36%	+37.91%
Max Drawdown (5Y) Largest decline over 5 years	-70.38%	-90.23%	+19.85%
Max Drawdown (10Y) Largest decline over 10 years	-73.72%	-99.56%	+25.84%
Current Drawdown Current decline from peak	-43.31%	-99.99%	+56.68%
Average Drawdown Average peak-to-trough decline	-22.34%	-93.36%	+71.02%
Ulcer Index Depth and duration of drawdowns from previous peaks	10.97%	25.60%	-14.63%

Volatility

PDM vs. SPXU - Volatility Comparison

Piedmont Office Realty Trust, Inc. (PDM) and ProShares UltraPro Short S&P500 (SPXU) have volatilities of 9.97% and 10.37%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PDM	SPXU	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.97%	10.37%	-0.40%
Volatility (6M) Calculated over the trailing 6-month period	25.50%	30.00%	-4.50%
Volatility (1Y) Calculated over the trailing 1-year period	31.78%	37.51%	-5.73%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	36.13%	50.67%	-14.54%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	34.45%	53.33%	-18.88%

Dividends

PDM vs. SPXU - Dividend Comparison

PDM has not paid dividends to shareholders, while SPXU's dividend yield for the trailing twelve months is around 6.92%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PDM Piedmont Office Realty Trust, Inc.	0.00%	1.50%	5.46%	9.42%	9.16%	5.71%	5.18%	3.78%	4.93%	6.83%	4.02%	4.45%
SPXU ProShares UltraPro Short S&P500	6.92%	7.02%	9.53%	7.06%	0.39%	0.00%	0.70%	2.14%	1.41%	0.10%	0.00%	0.00%

Frequently Asked Questions

Can I hold both PDM and SPXU in my portfolio?

PDM and SPXU have a correlation of -0.23, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PDM or SPXU?

SPXU has higher volatility (10.37%) compared to PDM (9.97%). In terms of maximum drawdown, PDM dropped -73.72% vs SPXU's -99.99%.

Which has better risk-adjusted returns?

PDM currently has the higher Sharpe Ratio (1.03 vs -1.10), 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.