PRULX Performance — T. Rowe Price U.S. Treasury Long-Term Index Fund
Data updated: 2026-08-12
PRULX returned −0.77% year to date and +4.11% over one year to May 2026. Annualised returns are −1.16% over 3 years and −5.68% over 5 years. The fund trailed its Long-Term Government Bond category average: $100 invested three years ago grew to $97, against $104 for the category, and to $104 over one year, against $106. Volatility over the past three years was 12.81% a year. In the 12 months to May 2026 the fund took in a net $142.0M, and assets reached $4.56B.
PRULX Growth of $100
What $100 invested in T. Rowe Price U.S. Treasury Long-Term Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Long-Term Government Bond category average over the same months.
| Period | PRULX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $104 | $106 |
| 3 years (Jun 2023 – May 2026) | $97 | $104 |
| 5 years (Jun 2021 – May 2026) | $75 | $86 |
| Since data start (Sep 2019 – May 2026) | $73 | $89 |
PRULX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | −0.77% |
| 1 year | +4.11% |
| 3 years (annualised) | −1.16% |
| 5 years (annualised) | −5.68% |
PRULX Annual Returns
Calendar-year total returns of T. Rowe Price U.S. Treasury Long-Term Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | −0.77% |
| 2025 | +5.26% |
| 2024 | −6.60% |
| 2023 | +2.39% |
| 2022 | −30.00% |
| 2021 | −5.25% |
| 2020 | +18.22% |
| 2019 (Sep–Dec) | −6.99% |
PRULX 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 | −0.5% | +4.2% | −4.1% | −0.7% | +0.5% | — | — | — | — | — | — | — |
| 2025 | +0.4% | +5.2% | −0.9% | −1.2% | −3.0% | +2.5% | −0.8% | +0.2% | +3.1% | +1.2% | +0.4% | −1.7% |
| 2024 | −2.3% | −2.3% | +1.1% | −5.9% | +2.8% | +1.7% | +3.6% | +2.0% | +2.0% | −5.3% | +1.9% | −5.4% |
| 2023 | +6.8% | −4.6% | +4.1% | +0.5% | −2.9% | −0.1% | −2.2% | −2.9% | −7.3% | −4.9% | +9.0% | +8.6% |
| 2022 | −3.8% | −1.5% | −5.4% | −9.1% | −2.0% | −1.5% | +2.6% | −4.6% | −8.0% | −5.4% | +6.9% | −2.2% |
| 2021 | −3.6% | −5.7% | −4.7% | +2.3% | +0.1% | +4.0% | +3.5% | −0.2% | −2.9% | +1.9% | +2.5% | −2.0% |
| 2020 | +7.2% | +6.6% | +6.2% | +1.8% | −1.8% | +0.3% | +4.2% | −4.9% | +0.8% | −3.2% | +1.5% | −1.1% |
| 2019 | — | — | — | — | — | — | — | — | −2.7% | −1.0% | −0.5% | −3.0% |
PRULX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 12.81%
- 3-year Sharpe ratio: -0.44 (vs 4.5% risk-free rate)
- Best month: +8.97% (Nov 2023)
- Worst month: −7.27% (Sep 2023)
PRULX Fund Flows
Monthly money in and out of T. Rowe Price U.S. Treasury Long-Term Index Fund, from SEC Form N-PORT.
- 12-month net flow: $142.0M
- 12-month gross sales (incl. reinvestments): $1.3B
- Sales ÷ redemptions: 1.13×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $67.3M | $79.9M | −$12.6M |
| Apr 2026 | $325.2M | $148.3M | $176.9M |
| Mar 2026 | $344.8M | $44.9M | $299.9M |
| Feb 2026 | $89.6M | $71.6M | $17.9M |
| Jan 2026 | $61.4M | $276.3M | −$214.9M |
| Dec 2025 | $87.0M | $115.7M | −$28.6M |
| Nov 2025 | $39.1M | $55.0M | −$16.0M |
| Oct 2025 | $38.7M | $49.6M | −$10.9M |
| Sep 2025 | $79.6M | $102.5M | −$22.9M |
| Aug 2025 | $35.7M | $52.6M | −$16.9M |
| Jul 2025 | $54.7M | $70.5M | −$15.8M |
| Jun 2025 | $49.0M | $63.2M | −$14.1M |
PRULX Assets Under Management
Net assets of T. Rowe Price U.S. Treasury Long-Term Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $4.56B |
| 2026-02-28 | $4.33B |
| 2025-11-30 | $4.52B |
| 2025-08-31 | $4.41B |
| 2025-05-31 | $4.42B |
| 2025-02-28 | $5.06B |
| 2024-11-30 | $5.17B |
| 2024-08-31 | $5.19B |
| 2024-05-31 | $4.89B |
| 2024-02-29 | $4.91B |
| 2023-11-30 | $4.73B |
| 2023-08-31 | $4.77B |
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.