PRTBX — Short-Term Treasury Portfolio
Data updated: 2026-06-29
PRTBX — Short-Term Treasury Portfolio data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Ultra-Short Treasury / Sovereign Bond · $12.87M AUM · 0.65% expense ratio · 2.8% 1-yr return. From SEC regulatory filings.
PRTBX Fund Overview
PRTBX — Short-Term Treasury Portfolio is a US mutual fund managed by Permanent Portfolio Family Of Funds, categorised as Ultra-Short Treasury / Sovereign Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Permanent Portfolio Family Of Funds
- Category: Ultra-Short Treasury / Sovereign Bond
- Assets under management: $12.87M
- 1-year return: 2.8%
- Ticker: PRTBX
- SEC CIK: 0000357298
- SEC series ID: S000006017
- Share class ID: C000016539
PRTBX Holdings
Top 10 holdings of Short-Term Treasury Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| United States Treasury | 11.71% |
| United States Treasury | 11.69% |
| United States Treasury | 11.66% |
| United States Treasury | 11.65% |
| United States Treasury | 11.64% |
| United States Treasury | 11.58% |
| United States Treasury | 11.55% |
| United States Treasury | 11.54% |
| United States Treasury | 3.87% |
| United States Treasury | 1.94% |
PRTBX Portfolio Allocation
Asset-class allocation of Short-Term Treasury Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 98.8% |
PRTBX Performance
Total returns for PRTBX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.6% |
| 1 year | 2.8% |
| 3 years (annualised) | 3.7% |
| 5 years (annualised) | 1.9% |
PRTBX Risk Information
Risk metrics for PRTBX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 0.7%
PRTBX Costs and Fees
PRTBX costs about $65 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.65%
- Gross expense ratio: 1.21%
- Portfolio turnover: 17%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
PRTBX Cashflows
Over the 12 months to 2026-04, Short-Term Treasury Portfolio had net outflows of $1.11M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | $186.16K |
| 2026-03 | $216.67K |
| 2026-02 | $199.24K |
| 2026-01 | $191.87K |
| 2025-12 | $192.47K |
| 2025-11 | $71.93K |
PRTBX Debt Constituents
Largest debt holdings of Short-Term Treasury Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 11.71% |
| United States Treasury | 11.69% |
| United States Treasury | 11.66% |
| United States Treasury | 11.65% |
| United States Treasury | 11.64% |
| United States Treasury | 11.58% |
| United States Treasury | 11.55% |
| United States Treasury | 11.54% |
| United States Treasury | 3.87% |
| United States Treasury | 1.94% |
PRTBX Prospectus and SEC Filings
Official Short-Term Treasury Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Ultra-Short Treasury / Sovereign Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.