UMNIX vs. PRTBX

Last updated Jun 24, 2026

UMNIX (Lazard US Short Duration Fixed Income Portfolio) and PRTBX (Permanent Portfolio Short-Term Treasury Portfolio) are both Ultrashort Bond funds. At a 0.45 correlation, their price movements are largely independent. UMNIX charges 0.40%/yr vs 0.65%/yr for PRTBX.

Performance

UMNIX vs. PRTBX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Lazard US Short Duration Fixed Income Portfolio (UMNIX) and Permanent Portfolio Short-Term Treasury Portfolio (PRTBX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

UMNIX

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

PRTBX

• 1D: -0.02%
• 1M: 0.14%
• YTD: 0.76%
• 6M: 0.85%
• 1Y: 2.85%
• 3Y*: 3.83%
• 5Y*: 1.99%
• 10Y*: 1.25%

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

UMNIX vs. PRTBX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
UMNIX Lazard US Short Duration Fixed Income Portfolio	0.22%	5.02%	3.88%	3.53%	-2.72%	-0.44%	2.47%	3.26%	1.09%	0.82%
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%

Correlation

The correlation between UMNIX and PRTBX is 0.69, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.69
Correlation (3Y) Calculated over the trailing 3-year period	0.73
Correlation (5Y) Calculated over the trailing 5-year period	0.73
Correlation (10Y) Calculated over the trailing 10-year period	0.59
Correlation (All Time) Calculated using the full available price history since Feb 28, 2011	0.45

Over the past year, UMNIX and PRTBX have become more correlated (0.69) than their long-term average of 0.45, meaning their price movements have been converging.

Return for Risk

UMNIX vs. PRTBX — Risk / Return Rank

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

UMNIX

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

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: 98
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.

UMNIX vs. PRTBX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Lazard US Short Duration Fixed Income Portfolio (UMNIX) and Permanent Portfolio Short-Term Treasury Portfolio (PRTBX). 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.

	UMNIX	PRTBX	Difference
Sharpe ratio: Return per unit of total volatility	—	4.41	—
Sortino ratio: Return per unit of downside risk	—	7.92	—
Omega ratio: Gain probability vs. loss probability	—	2.16	—
Calmar ratio: Return relative to maximum drawdown	—	9.28	—
Martin ratio: Return relative to average drawdown	—	44.99	—

Drawdowns

Drawdown Indicators

	UMNIX	PRTBX	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	—	-3.66%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-4.36%	—
Current Drawdown Current decline from peak	—	-0.12%	—
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

	UMNIX	PRTBX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.22%	—
Volatility (6M) Calculated over the trailing 6-month period	—	0.43%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	0.67%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	1.21%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	0.87%	—

UMNIX vs. PRTBX - Expense Ratio Comparison

UMNIX has a 0.40% expense ratio, which is lower than PRTBX's 0.65% expense ratio.

Dividends

UMNIX vs. PRTBX - Dividend Comparison

UMNIX's dividend yield for the trailing twelve months is around 2.96%, less than PRTBX's 3.36% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
UMNIX Lazard US Short Duration Fixed Income Portfolio	2.96%	3.94%	3.48%	2.70%	1.30%	0.16%	1.22%	2.48%	2.00%	1.53%	1.30%	1.06%

Frequently Asked Questions

Can I hold both UMNIX and PRTBX in my portfolio?

UMNIX and PRTBX have a correlation of 0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.