TSBLX Performance — T. Rowe Price QM U.S. Bond Index Fund, I Class
Data updated: 2026-09-25
TSBLX returned −0.56% year to date and +2.85% over one year to Jul 2026. Annualised returns are +3.89% over 3 years and −0.43% over 5 years. The fund trailed its Intermediate Core Bond category average: $100 invested three years ago grew to $112, against $113 for the category, and to $103 over one year, against $103. Volatility over the past three years was 5.58% a year. In the 12 months to Jul 2026 the fund took in a net $661.9M, and assets reached $2.47B.
TSBLX Growth of $100
What $100 invested in T. Rowe Price QM U.S. Bond Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Intermediate Core Bond category average over the same months.
| Period | TSBLX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $103 | $103 |
| 3 years (Aug 2023 – Jul 2026) | $112 | $113 |
| 5 years (Aug 2021 – Jul 2026) | $98 | $100 |
| Since data start (Oct 2020 – Jul 2026) | $99 | $102 |
TSBLX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | −0.56% |
| 1 year | +2.85% |
| 3 years (annualised) | +3.89% |
| 5 years (annualised) | −0.43% |
TSBLX Annual Returns
Calendar-year total returns of T. Rowe Price QM U.S. Bond Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | −0.56% |
| 2025 | +7.27% |
| 2024 | +1.61% |
| 2023 | +5.60% |
| 2022 | −13.52% |
| 2021 | −1.35% |
| 2020 (Oct–Dec) | +1.28% |
TSBLX 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% | +1.7% | −1.8% | +0.1% | +0.4% | +0.3% | −1.3% | — | — | — | — | — |
| 2025 | +0.6% | +2.2% | 0.0% | +0.4% | −0.8% | +1.5% | −0.3% | +1.2% | +1.1% | +0.7% | +0.5% | −0.1% |
| 2024 | −0.1% | −1.3% | +0.8% | −2.4% | +1.8% | +1.0% | +2.4% | +1.4% | +1.4% | −2.5% | +1.0% | −1.6% |
| 2023 | +3.3% | −2.5% | +2.3% | +0.7% | −1.1% | −0.4% | −0.1% | −0.5% | −2.5% | −1.6% | +4.4% | +3.9% |
| 2022 | −2.0% | −1.2% | −2.9% | −3.7% | +0.4% | −1.5% | +2.3% | −2.7% | −4.3% | −1.6% | +3.6% | −0.5% |
| 2021 | −0.5% | −1.4% | −1.2% | +0.8% | +0.2% | +0.8% | +1.1% | −0.2% | −0.7% | −0.1% | +0.2% | −0.4% |
| 2020 | — | — | — | — | — | — | — | — | — | −0.1% | +1.1% | +0.3% |
TSBLX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 5.58%
- 3-year Sharpe ratio: -0.11 (vs 4.5% risk-free rate)
- Best month: +4.43% (Nov 2023)
- Worst month: −2.52% (Sep 2023)
TSBLX Fund Flows
Monthly money in and out of T. Rowe Price QM U.S. Bond Index Fund, from SEC Form N-PORT.
- 12-month net flow: $661.9M
- 12-month gross sales (incl. reinvestments): $1.2B
- Sales ÷ redemptions: 2.27×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $68.2M | $38.1M | $30.1M |
| Jun 2026 | $115.3M | $147.1M | −$31.8M |
| May 2026 | $171.9M | $36.0M | $135.9M |
| Apr 2026 | $67.2M | $33.3M | $33.9M |
| Mar 2026 | $111.1M | $24.0M | $87.0M |
| Feb 2026 | $97.3M | $42.1M | $55.2M |
| Jan 2026 | $117.4M | $36.0M | $81.4M |
| Dec 2025 | $120.0M | $24.9M | $95.1M |
| Nov 2025 | $89.5M | $30.1M | $59.4M |
| Oct 2025 | $90.1M | $45.1M | $44.9M |
| Sep 2025 | $64.3M | $21.6M | $42.7M |
| Aug 2025 | $69.8M | $41.6M | $28.1M |
TSBLX Assets Under Management
Net assets of T. Rowe Price QM U.S. Bond Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $2.47B |
| 2026-04-30 | $2.38B |
| 2026-01-31 | $2.23B |
| 2025-10-31 | $2.00B |
| 2025-07-31 | $1.85B |
| 2025-04-30 | $1.77B |
| 2025-01-31 | $1.67B |
| 2024-10-31 | $1.59B |
| 2024-07-31 | $1.50B |
| 2024-04-30 | $1.31B |
| 2024-01-31 | $1.28B |
| 2023-10-31 | $1.16B |
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.