PRTBX vs. BUSIX

Last updated Jun 5, 2026

PRTBX (Permanent Portfolio Short-Term Treasury Portfolio) and BUSIX (Sterling Capital Ultra Short Bond Fund) are both Ultrashort Bond funds. At a 0.18 correlation, their price movements are largely independent. PRTBX charges 0.65%/yr vs 0.27%/yr for BUSIX.

Performance

PRTBX vs. BUSIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Permanent Portfolio Short-Term Treasury Portfolio (PRTBX) and Sterling Capital Ultra Short Bond Fund (BUSIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

PRTBX

• 1D: -0.02%
• 1M: 0.15%
• YTD: 0.75%
• 6M: 1.02%
• 1Y: 3.05%
• 3Y*: 3.85%
• 5Y*: 1.98%
• 10Y*: 1.26%

BUSIX

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

PRTBX vs. BUSIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PRTBX Permanent Portfolio Short-Term Treasury Portfolio	0.75%	4.19%	4.12%	3.79%	-2.28%	-0.74%	0.10%	1.76%	1.16%	0.12%
BUSIX Sterling Capital Ultra Short Bond Fund	0.83%	4.93%	5.87%	5.09%	0.32%	0.31%	2.16%	3.27%	1.66%	1.37%

Correlation

The correlation between PRTBX and BUSIX is 0.21, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.21
Correlation (3Y) Calculated over the trailing 3-year period	0.30
Correlation (5Y) Calculated over the trailing 5-year period	0.34
Correlation (10Y) Calculated over the trailing 10-year period	0.22
Correlation (All Time) Calculated using the full available price history since Jan 3, 2013	0.18

The correlation between PRTBX and BUSIX shifts across timeframes, from 0.18 (all time) to 0.34 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

PRTBX vs. BUSIX — 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

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. BUSIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Permanent Portfolio Short-Term Treasury Portfolio (PRTBX) and Sterling Capital Ultra Short Bond Fund (BUSIX). 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	BUSIX	Difference
Sharpe ratio: Return per unit of total volatility	4.70	—	—
Sortino ratio: Return per unit of downside risk	8.77	—	—
Omega ratio: Gain probability vs. loss probability	2.25	—	—
Calmar ratio: Return relative to maximum drawdown	9.97	—	—
Martin ratio: Return relative to average drawdown	48.35	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	PRTBX	BUSIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	4.70	—	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.65	—	—
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	—	—

Drawdowns

Drawdown Indicators

	PRTBX	BUSIX	Difference
Max Drawdown Largest peak-to-trough decline	-5.13%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-0.32%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-0.44%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-3.70%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-4.36%	—	—
Current Drawdown Current decline from peak	-0.03%	—	—
Average Drawdown Average peak-to-trough decline	-0.96%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	0.07%	—	—

Volatility

Volatility by Period

	PRTBX	BUSIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.15%	—	—
Volatility (6M) Calculated over the trailing 6-month period	0.40%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	0.68%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.21%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.86%	—	—

PRTBX vs. BUSIX - Expense Ratio Comparison

PRTBX has a 0.65% expense ratio, which is higher than BUSIX's 0.27% expense ratio.

Dividends

PRTBX vs. BUSIX - Dividend Comparison

PRTBX's dividend yield for the trailing twelve months is around 3.36%, more than BUSIX's 3.19% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUSIX Sterling Capital Ultra Short Bond Fund	3.19%	4.29%	4.65%	3.48%	1.87%	1.24%	1.72%	2.60%	2.05%	1.57%	1.74%	1.36%
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%	0.00%	0.00%

Frequently Asked Questions

Can I hold both PRTBX and BUSIX in my portfolio?

PRTBX and BUSIX have a correlation of 0.21, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.