PRTBX Performance — Short-Term Treasury Portfolio, Class I
Data updated: 2026-09-25
PRTBX returned +1.10% year to date and +2.99% over one year to Jul 2026. Annualised returns are +3.87% over 3 years and +2.07% over 5 years. Against its Ultrashort Government Bond category average the fund came out behind over three years but ahead over one: $100 invested three years ago grew to $112, against $119 for the category, and to $103 over one year, against $97. Volatility over the past three years was 0.76% a year. In the 12 months to Jul 2026 the fund lost a net $1.4M, and assets reached $12.30M.
PRTBX Growth of $100
What $100 invested in Short-Term Treasury Portfolio grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Ultrashort Government Bond category average over the same months.
| Period | PRTBX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $103 | $97 |
| 3 years (Aug 2023 – Jul 2026) | $112 | $119 |
| 5 years (Aug 2021 – Jul 2026) | $111 | $112 |
| Since data start (Aug 2019 – Jul 2026) | $111 | $134 |
PRTBX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.10% |
| 1 year | +2.99% |
| 3 years (annualised) | +3.87% |
| 5 years (annualised) | +2.07% |
PRTBX Annual Returns
Calendar-year total returns of Short-Term Treasury Portfolio, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +1.10% |
| 2025 | +4.19% |
| 2024 | +4.12% |
| 2023 | +3.79% |
| 2022 | −2.29% |
| 2021 | −0.76% |
| 2020 | +0.09% |
| 2019 (Aug–Dec) | +0.56% |
PRTBX Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.2% | +0.3% | −0.1% | +0.2% | +0.2% | +0.1% | +0.2% | — | — | — | — | — |
| 2025 | +0.3% | +0.5% | +0.4% | +0.6% | −0.1% | +0.4% | 0.0% | +0.6% | +0.3% | +0.3% | +0.3% | +0.3% |
| 2024 | +0.4% | +0.1% | +0.3% | +0.1% | +0.5% | +0.4% | +0.7% | +0.6% | +0.6% | −0.2% | +0.3% | +0.3% |
| 2023 | +0.6% | −0.5% | +1.2% | +0.2% | −0.2% | −0.1% | +0.4% | +0.4% | +0.2% | +0.4% | +0.5% | +0.6% |
| 2022 | −0.4% | −0.2% | −0.6% | −0.3% | +0.3% | −0.1% | +0.4% | −0.8% | −1.1% | −0.1% | +0.5% | +0.2% |
| 2021 | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% |
| 2020 | +0.1% | +0.1% | +0.3% | 0.0% | −0.1% | 0.0% | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% | −0.1% |
| 2019 | — | — | — | — | — | — | — | +0.1% | +0.1% | +0.1% | +0.1% | +0.1% |
PRTBX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 0.76%
- 3-year Sharpe ratio: -0.82 (vs 4.5% risk-free rate)
- Best month: +0.69% (Jul 2024)
- Worst month: −0.22% (Oct 2024)
PRTBX Fund Flows
Monthly money in and out of Short-Term Treasury Portfolio, from SEC Form N-PORT.
- 12-month net flow: −$1.4M
- 12-month gross sales (incl. reinvestments): $3.5M
- Sales ÷ redemptions: 0.71×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $113K | $796K | −$683K |
| Jun 2026 | $481K | $454K | $27K |
| May 2026 | $107K | $84K | $23K |
| Apr 2026 | $341K | $154K | $186K |
| Mar 2026 | $735K | $518K | $217K |
| Feb 2026 | $333K | $134K | $199K |
| Jan 2026 | $219K | $27K | $192K |
| Dec 2025 | $538K | $346K | $192K |
| Nov 2025 | $148K | $77K | $72K |
| Oct 2025 | $223K | $275K | −$52K |
| Sep 2025 | $139K | $264K | −$125K |
| Aug 2025 | $84K | $1.8M | −$1.7M |
PRTBX Assets Under Management
Net assets of Short-Term Treasury Portfolio by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $12.30M |
| 2026-04-30 | $12.87M |
| 2026-01-31 | $12.22M |
| 2025-10-31 | $12.06M |
| 2025-07-31 | $13.77M |
| 2025-04-30 | $14.03M |
| 2025-01-31 | $13.46M |
| 2024-10-31 | $13.47M |
| 2024-07-31 | $11.45M |
| 2024-04-30 | $11.38M |
| 2024-01-31 | $11.76M |
| 2023-10-31 | $11.31M |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.