PRTBX vs. PSDSX

Last updated Jun 3, 2026

PRTBX (Permanent Portfolio Short-Term Treasury Portfolio) and PSDSX (Palmer Square Ultra-Short Duration Investment Grade Fund) are both Ultrashort Bond funds. Over the past 5 years, PRTBX returned 1.98%/yr vs 2.62%/yr for PSDSX. At a 0.32 correlation, their price movements are largely independent. PRTBX charges 0.65%/yr vs 0.53%/yr for PSDSX.

Performance

PRTBX vs. PSDSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Permanent Portfolio Short-Term Treasury Portfolio (PRTBX) and Palmer Square Ultra-Short Duration Investment Grade Fund (PSDSX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PRTBX achieves a 0.76% return, which is significantly lower than PSDSX's 0.80% return.

PRTBX

• 1D: -0.02%
• 1M: 0.15%
• YTD: 0.76%
• 6M: 1.06%
• 1Y: 3.18%
• 3Y*: 3.85%
• 5Y*: 1.98%
• 10Y*: 1.26%

PSDSX

• 1D: 0.00%
• 1M: 0.35%
• YTD: 0.80%
• 6M: 1.14%
• 1Y: 3.41%
• 3Y*: 3.85%
• 5Y*: 2.62%
• 10Y*: —

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

PRTBX vs. PSDSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PRTBX Permanent Portfolio Short-Term Treasury Portfolio	0.76%	4.19%	4.12%	3.79%	-2.28%	-0.74%	0.10%	1.76%	1.16%	0.12%
PSDSX Palmer Square Ultra-Short Duration Investment Grade Fund	0.80%	3.67%	4.43%	4.69%	-0.28%	0.05%	1.59%	3.00%	1.84%	1.51%

Correlation

The correlation between PRTBX and PSDSX is 0.35, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.35
Correlation (3Y) Calculated over the trailing 3-year period	0.35
Correlation (5Y) Calculated over the trailing 5-year period	0.42
Correlation (All Time) Calculated using the full available price history since Jan 4, 2017	0.32

The correlation between PRTBX and PSDSX shifts across timeframes, from 0.32 (all time) to 0.42 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

PRTBX vs. PSDSX — Risk / Return Rank

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

PRTBX

PRTBX Risk / Return Rank: 99
PRTBX Sharpe Ratio Rank: 99
PRTBX Sortino Ratio Rank: 99
PRTBX Omega Ratio Rank: 98
PRTBX Calmar Ratio Rank: 99
PRTBX Martin Ratio Rank: 99

PSDSX

PSDSX Risk / Return Rank: 96
PSDSX Sharpe Ratio Rank: 98
PSDSX Sortino Ratio Rank: 91
PSDSX Omega Ratio Rank: 99
PSDSX Calmar Ratio Rank: 93
PSDSX Martin Ratio Rank: 97

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.

PRTBX vs. PSDSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Permanent Portfolio Short-Term Treasury Portfolio (PRTBX) and Palmer Square Ultra-Short Duration Investment Grade Fund (PSDSX). 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.

	PRTBX	PSDSX	Difference
Sharpe ratio Return per unit of total volatility	4.64	4.00	+0.64
Sortino ratio Return per unit of downside risk	8.62	4.47	+4.15
Omega ratio Gain probability vs. loss probability	2.23	4.20	-1.97
Calmar ratio Return relative to maximum drawdown	10.12	5.30	+4.82
Martin ratio Return relative to average drawdown	49.14	26.66	+22.48
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PRTBX vs. PSDSX - Sharpe Ratio Comparison

The current PRTBX Sharpe Ratio is 4.64, which is comparable to the PSDSX Sharpe Ratio of 4.00. The chart below compares the historical Sharpe Ratios of PRTBX and PSDSX, 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

	PRTBX	PSDSX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	4.64	4.00	+0.64
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.65	2.00	-0.35
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.46	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	3.89	2.10	+1.79

Drawdowns

PRTBX vs. PSDSX - Drawdown Comparison

The maximum PRTBX drawdown since its inception was -5.13%, which is greater than PSDSX's maximum drawdown of -3.03%. Use the drawdown chart below to compare losses from any high point for PRTBX and PSDSX.

Drawdown Indicators

	PRTBX	PSDSX	Difference
Max Drawdown Largest peak-to-trough decline	-5.13%	-3.03%	-2.10%
Max Drawdown (1Y) Largest decline over 1 year	-0.32%	-0.80%	+0.48%
Max Drawdown (3Y) Largest decline over 3 years	-0.44%	-1.29%	+0.85%
Max Drawdown (5Y) Largest decline over 5 years	-3.70%	-1.52%	-2.18%
Max Drawdown (10Y) Largest decline over 10 years	-4.36%	—	—
Current Drawdown Current decline from peak	-0.02%	0.00%	-0.02%
Average Drawdown Average peak-to-trough decline	-0.96%	-0.19%	-0.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.07%	0.16%	-0.09%

Volatility

PRTBX vs. PSDSX - Volatility Comparison

Permanent Portfolio Short-Term Treasury Portfolio (PRTBX) has a higher volatility of 0.15% compared to Palmer Square Ultra-Short Duration Investment Grade Fund (PSDSX) at 0.14%. This indicates that PRTBX's price experiences larger fluctuations and is considered to be riskier than PSDSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PRTBX	PSDSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.15%	0.14%	+0.01%
Volatility (6M) Calculated over the trailing 6-month period	0.40%	0.89%	-0.49%
Volatility (1Y) Calculated over the trailing 1-year period	0.68%	0.98%	-0.30%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.21%	1.35%	-0.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.86%	1.09%	-0.23%

PRTBX vs. PSDSX - Expense Ratio Comparison

PRTBX has a 0.65% expense ratio, which is higher than PSDSX's 0.53% expense ratio.

Dividends

PRTBX vs. PSDSX - Dividend Comparison

PRTBX's dividend yield for the trailing twelve months is around 3.36%, less than PSDSX's 3.54% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
PRTBX Permanent Portfolio Short-Term Treasury Portfolio	3.36%	3.39%	2.69%	1.79%	0.00%	0.00%	0.21%	1.65%	0.83%	0.00%
PSDSX Palmer Square Ultra-Short Duration Investment Grade Fund	3.54%	3.57%	4.06%	3.57%	1.70%	0.50%	1.21%	2.51%	2.18%	1.50%

Frequently Asked Questions

Can I hold both PRTBX and PSDSX in my portfolio?

PRTBX and PSDSX have a correlation of 0.35, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PRTBX or PSDSX?

PRTBX has higher volatility (0.15%) compared to PSDSX (0.14%). In terms of maximum drawdown, PRTBX dropped -5.13% vs PSDSX's -3.03%.

Which has better risk-adjusted returns?

PRTBX currently has the higher Sharpe Ratio (4.64 vs 4.00), 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.