Shareholder Report
|
12 Months Ended |
|
May 31, 2026
USD ($)
Holding
|
|---|
| Shareholder Report [Line Items] |
|
| Document Type |
N-CSR
|
| Amendment Flag |
false
|
| Registrant Name |
T. ROWE PRICE SHORT-TERM BOND FUND, INC.
|
| Entity Central Index Key |
0000731890
|
| Entity Investment Company Type |
N-1A
|
| Document Period End Date |
May 31, 2026
|
| Shareholder Report Annual or Semi-Annual |
Annual Shareholder Report
|
| C000119983 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
Ultra Short-Term Bond Fund
|
| Class Name |
Investor Class
|
| Trading Symbol |
TRBUX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about Ultra Short-Term Bond Fund (the "fund") for the period of June 1, 2025 to May 31, 2026.
|
| Additional Information [Text Block] |
You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
|
| Material Fund Change Notice [Text Block] |
|
| Additional Information Phone Number |
1‑800‑638‑5660
|
| Additional Information Email |
<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
|
| Additional Information Website |
www.troweprice.com/prospectus
|
| Expenses [Text Block] |
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Table Summary
|
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Ultra Short-Term Bond Fund - Investor Class |
$32 |
0.31% | |
| Expenses Paid, Amount |
$ 32
|
| Expense Ratio, Percent |
0.31%
|
| Factors Affecting Performance [Text Block] |
What drove fund performance during the past 12 months?The shorter-maturity U.S. investment-grade bond market generated positive returns over the year ended May 31, 2026, as front-end yields ended lower amid elevated rate volatility, driven by moderating inflation expectations and Federal Reserve rate cuts during the second half of 2025. The fund’s out-of-benchmark allocations to mortgage-backed securities (MBS), asset-backed securities, and commercial mortgage-backed securities aided performance relative to its style-specific benchmark, the Bloomberg Short-Term Government/Corporate Index, as spreads tightened. Similarly, an overweight to investment-grade corporate bonds and corresponding underweight to U.S. Treasuries contributed. Security selection within investment-grade corporate bonds also generated positive returns. The fund’s slight overweight duration contributed to performance as front-end yields largely shifted lower over the period. Key rate management, particularly our two-year key rate positioning, detracted from returns relative to the style-specific benchmark over the year. The fund seeks a high level of income consistent with minimal fluctuations in principal value and liquidity. The fund’s allocation to investment-grade corporate bonds decreased over the reporting period but continued to represent its largest absolute and relative position. We increased the fund’s allocation to U.S. Treasuries and MBS. While we are primarily a cash bond manager, we employ the use of derivatives in our strategy for hedging purposes. The use of derivatives may include futures and options, as well as credit default swaps and interest rate swaps.
|
| Performance Past Does Not Indicate Future [Text] |
The fund’s past performance is not a good predictor of the fund’s future performance.
|
| Line Graph [Table Text Block] |
Table Summary
|
Investor Class |
Regulatory Benchmark |
Strategy Benchmark |
2016 |
10,000 |
10,000 |
10,000 |
2016 |
10,049 |
10,232 |
10,023 |
2016 |
10,082 |
9,908 |
10,037 |
2017 |
10,118 |
10,008 |
10,063 |
2017 |
10,177 |
10,158 |
10,078 |
2017 |
10,219 |
10,283 |
10,110 |
2017 |
10,263 |
10,227 |
10,133 |
2018 |
10,290 |
10,059 |
10,160 |
2018 |
10,348 |
10,120 |
10,209 |
2018 |
10,416 |
10,175 |
10,265 |
2018 |
10,463 |
10,089 |
10,318 |
2019 |
10,563 |
10,378 |
10,394 |
2019 |
10,686 |
10,768 |
10,470 |
2019 |
10,781 |
11,210 |
10,548 |
2019 |
10,826 |
11,178 |
10,605 |
2020 |
10,929 |
11,590 |
10,671 |
2020 |
10,922 |
11,781 |
10,739 |
2020 |
11,099 |
11,936 |
10,754 |
2020 |
11,157 |
11,992 |
10,761 |
2021 |
11,200 |
11,750 |
10,768 |
2021 |
11,222 |
11,734 |
10,774 |
2021 |
11,220 |
11,925 |
10,776 |
2021 |
11,217 |
11,854 |
10,775 |
2022 |
11,149 |
11,440 |
10,758 |
2022 |
11,064 |
10,769 |
10,757 |
2022 |
11,067 |
10,552 |
10,758 |
2022 |
11,047 |
10,332 |
10,803 |
2023 |
11,237 |
10,328 |
10,914 |
2023 |
11,367 |
10,538 |
11,040 |
2023 |
11,555 |
10,426 |
11,185 |
2023 |
11,733 |
10,454 |
11,345 |
2024 |
11,972 |
10,671 |
11,494 |
2024 |
12,154 |
10,676 |
11,643 |
2024 |
12,364 |
11,187 |
11,822 |
2024 |
12,542 |
11,173 |
11,964 |
2025 |
12,696 |
11,291 |
12,104 |
2025 |
12,848 |
11,258 |
12,227 |
2025 |
13,026 |
11,538 |
12,371 |
2025 |
13,174 |
11,809 |
12,504 |
2026 |
13,344 |
11,998 |
12,624 |
2026 |
13,461 |
11,836 |
12,732 |
|
| Average Annual Return [Table Text Block] |
Table Summary
|
1 Year |
5 Years |
10 Years |
Ultra Short-Term Bond Fund (Investor Class) |
4.77% |
3.70% |
3.02% |
Bloomberg U.S. Aggregate Bond Index (Regulatory Benchmark) |
5.13 |
0.17 |
1.70 |
Bloomberg Short-Term Government/Corporate Index (Strategy Benchmark) |
4.12 |
3.40 |
2.44 | |
| No Deduction of Taxes [Text Block] |
Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
|
| Updated Performance Information Location [Text Block] |
Updated performance information can be found at www.troweprice.com.
|
| Distribution of Capital [Text Block] |
The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
|
| AssetsNet |
$ 2,934,740,000
|
| Holdings Count | Holding |
541
|
| Advisory Fees Paid, Amount |
$ 3,876,000
|
| InvestmentCompanyPortfolioTurnover |
85.60%
|
| Additional Fund Statistics Significance or Limits [Text Block] |
What are some fund statistics? - Total Net Assets (000s)$2,934,740
- Number of Portfolio Holdings541
|
| Holdings [Text Block] |
Table Summary
Corporate Bonds |
51.4% |
Asset-Backed Securities |
21.5 |
Non-U.S. Government Mortgage-Backed Securities |
9.5 |
Commercial Paper |
8.8 |
U.S. Government Agency Obligations (Excluding Mortgage-Backed) |
4.3 |
U.S. Government & Agency Mortgage-Backed Securities |
3.2 |
U.S. Treasury Obligations |
1.0 |
Foreign Government Obligations & Municipalities |
0.7 |
Securities Lending Collateral |
0.2 |
Short-Term and Other |
-0.6 | |
| Largest Holdings [Text Block] |
Table Summary
U.S. Treasury Notes |
4.3% |
Carvana Auto Receivables Trust |
2.1 |
Federal National Mortgage Assn. |
2.0 |
Structured Agency Credit Risk Debt Notes |
1.8 |
Exeter Automobile Receivables Trust |
1.4 |
Bain Capital Credit |
1.3 |
Federal Home Loan Mortgage |
1.2 |
HCA |
1.1 |
Southern California Edison |
1.0 |
Global Payments |
1.0 | |
| Material Fund Change [Text Block] |
|
| Updated Prospectus Web Address |
www.troweprice.com/paperless
|
| C000193195 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
Ultra Short-Term Bond Fund
|
| Class Name |
I Class
|
| Trading Symbol |
TRSTX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about Ultra Short-Term Bond Fund (the "fund") for the period of June 1, 2025 to May 31, 2026.
|
| Additional Information [Text Block] |
You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
|
| Material Fund Change Notice [Text Block] |
|
| Additional Information Phone Number |
1‑800‑638‑5660
|
| Additional Information Email |
<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
|
| Additional Information Website |
www.troweprice.com/prospectus
|
| Expenses [Text Block] |
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Table Summary
|
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Ultra Short-Term Bond Fund - I Class |
$20 |
0.20% | |
| Expenses Paid, Amount |
$ 20
|
| Expense Ratio, Percent |
0.20%
|
| Factors Affecting Performance [Text Block] |
What drove fund performance during the past 12 months?The shorter-maturity U.S. investment-grade bond market generated positive returns over the year ended May 31, 2026, as front-end yields ended lower amid elevated rate volatility, driven by moderating inflation expectations and Federal Reserve rate cuts during the second half of 2025. The fund’s out-of-benchmark allocations to mortgage-backed securities (MBS), asset-backed securities, and commercial mortgage-backed securities aided performance relative to its style-specific benchmark, the Bloomberg Short-Term Government/Corporate Index, as spreads tightened. Similarly, an overweight to investment-grade corporate bonds and corresponding underweight to U.S. Treasuries contributed. Security selection within investment-grade corporate bonds also generated positive returns. The fund’s slight overweight duration contributed to performance as front-end yields largely shifted lower over the period. Key rate management, particularly our two-year key rate positioning, detracted from returns relative to the style-specific benchmark over the year. The fund seeks a high level of income consistent with minimal fluctuations in principal value and liquidity. The fund’s allocation to investment-grade corporate bonds decreased over the reporting period but continued to represent its largest absolute and relative position. We increased the fund’s allocation to U.S. Treasuries and MBS. While we are primarily a cash bond manager, we employ the use of derivatives in our strategy for hedging purposes. The use of derivatives may include futures and options, as well as credit default swaps and interest rate swaps.
|
| Performance Past Does Not Indicate Future [Text] |
The fund’s past performance is not a good predictor of the fund’s future performance.
|
| Line Graph [Table Text Block] |
Table Summary
|
I Class |
Regulatory Benchmark |
Strategy Benchmark |
7/6/17 |
500,000 |
500,000 |
500,000 |
8/31/17 |
501,296 |
508,001 |
501,061 |
11/30/17 |
503,453 |
505,225 |
502,200 |
2/28/18 |
505,761 |
496,943 |
503,530 |
5/31/18 |
507,612 |
499,953 |
505,967 |
8/31/18 |
511,954 |
502,670 |
508,753 |
11/30/18 |
514,303 |
498,444 |
511,399 |
2/28/19 |
518,165 |
512,695 |
515,166 |
5/31/19 |
525,245 |
531,952 |
518,895 |
8/31/19 |
530,020 |
553,804 |
522,775 |
11/30/19 |
532,331 |
552,233 |
525,615 |
2/29/20 |
537,552 |
572,591 |
528,899 |
5/31/20 |
537,370 |
582,038 |
532,256 |
8/31/20 |
546,241 |
589,654 |
533,014 |
11/30/20 |
549,285 |
592,456 |
533,343 |
2/28/21 |
551,549 |
580,513 |
533,681 |
5/31/21 |
552,827 |
579,681 |
533,968 |
8/31/21 |
552,886 |
589,157 |
534,097 |
11/30/21 |
551,832 |
585,623 |
534,027 |
2/28/22 |
549,787 |
565,164 |
533,178 |
5/31/22 |
545,781 |
532,020 |
533,162 |
8/31/22 |
544,997 |
521,310 |
533,171 |
11/30/22 |
545,250 |
510,431 |
535,400 |
2/28/23 |
554,794 |
510,219 |
540,927 |
5/31/23 |
561,370 |
520,619 |
547,159 |
8/31/23 |
570,814 |
515,090 |
554,341 |
11/30/23 |
579,788 |
516,453 |
562,293 |
2/29/24 |
591,734 |
527,195 |
569,670 |
5/31/24 |
600,884 |
527,416 |
577,033 |
8/31/24 |
611,418 |
552,674 |
585,914 |
11/30/24 |
619,199 |
551,960 |
592,958 |
2/28/25 |
628,187 |
557,816 |
599,889 |
5/31/25 |
635,921 |
556,207 |
606,019 |
8/31/25 |
644,880 |
570,007 |
613,116 |
11/30/25 |
652,401 |
583,428 |
619,720 |
2/28/26 |
659,709 |
592,738 |
625,651 |
5/31/26 |
665,669 |
584,759 |
631,007 |
|
| Average Annual Return [Table Text Block] |
Table Summary
|
1 Year |
5 Years |
Since Inception 7/6/17 |
Ultra Short-Term Bond Fund (I Class) |
4.68% |
3.78% |
3.27% |
Bloomberg U.S. Aggregate Bond Index (Regulatory Benchmark) |
5.13 |
0.17 |
1.77 |
Bloomberg Short-Term Government/Corporate Index (Strategy Benchmark) |
4.12 |
3.40 |
2.65 | |
| Performance Inception Date |
Jul. 06, 2017
|
| No Deduction of Taxes [Text Block] |
Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
|
| Updated Performance Information Location [Text Block] |
Updated performance information can be found at www.troweprice.com.
|
| Distribution of Capital [Text Block] |
The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
|
| AssetsNet |
$ 2,934,740,000
|
| Holdings Count | Holding |
541
|
| Advisory Fees Paid, Amount |
$ 3,876,000
|
| InvestmentCompanyPortfolioTurnover |
85.60%
|
| Additional Fund Statistics Significance or Limits [Text Block] |
What are some fund statistics? - Total Net Assets (000s)$2,934,740
- Number of Portfolio Holdings541
|
| Holdings [Text Block] |
Table Summary
Corporate Bonds |
51.4% |
Asset-Backed Securities |
21.5 |
Non-U.S. Government Mortgage-Backed Securities |
9.5 |
Commercial Paper |
8.8 |
U.S. Government Agency Obligations (Excluding Mortgage-Backed) |
4.3 |
U.S. Government & Agency Mortgage-Backed Securities |
3.2 |
U.S. Treasury Obligations |
1.0 |
Foreign Government Obligations & Municipalities |
0.7 |
Securities Lending Collateral |
0.2 |
Short-Term and Other |
-0.6 | |
| Largest Holdings [Text Block] |
Table Summary
U.S. Treasury Notes |
4.3% |
Carvana Auto Receivables Trust |
2.1 |
Federal National Mortgage Assn. |
2.0 |
Structured Agency Credit Risk Debt Notes |
1.8 |
Exeter Automobile Receivables Trust |
1.4 |
Bain Capital Credit |
1.3 |
Federal Home Loan Mortgage |
1.2 |
HCA |
1.1 |
Southern California Edison |
1.0 |
Global Payments |
1.0 | |
| Material Fund Change [Text Block] |
|
| Updated Prospectus Web Address |
www.troweprice.com/paperless
|
| C000225825 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
Ultra Short-Term Bond Fund
|
| Class Name |
Z Class
|
| Trading Symbol |
TRZWX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about Ultra Short-Term Bond Fund (the "fund") for the period of June 1, 2025 to May 31, 2026.
|
| Additional Information [Text Block] |
You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
|
| Material Fund Change Notice [Text Block] |
|
| Additional Information Phone Number |
1‑800‑638‑5660
|
| Additional Information Email |
<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
|
| Additional Information Website |
www.troweprice.com/prospectus
|
| Expenses [Text Block] |
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
Table Summary
|
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Ultra Short-Term Bond Fund - Z Class |
$0 |
0.00% | |
| Expenses Paid, Amount |
$ 0
|
| Expense Ratio, Percent |
0.00%
|
| Factors Affecting Performance [Text Block] |
What drove fund performance during the past 12 months?The shorter-maturity U.S. investment-grade bond market generated positive returns over the year ended May 31, 2026, as front-end yields ended lower amid elevated rate volatility, driven by moderating inflation expectations and Federal Reserve rate cuts during the second half of 2025. The fund’s out-of-benchmark allocations to mortgage-backed securities (MBS), asset-backed securities, and commercial mortgage-backed securities aided performance relative to its style-specific benchmark, the Bloomberg Short-Term Government/Corporate Index, as spreads tightened. Similarly, an overweight to investment-grade corporate bonds and corresponding underweight to U.S. Treasuries contributed. Security selection within investment-grade corporate bonds also generated positive returns. The fund’s slight overweight duration contributed to performance as front-end yields largely shifted lower over the period. Key rate management, particularly our two-year key rate positioning, detracted from returns relative to the style-specific benchmark over the year. The fund seeks a high level of income consistent with minimal fluctuations in principal value and liquidity. The fund’s allocation to investment-grade corporate bonds decreased over the reporting period but continued to represent its largest absolute and relative position. We increased the fund’s allocation to U.S. Treasuries and MBS. While we are primarily a cash bond manager, we employ the use of derivatives in our strategy for hedging purposes. The use of derivatives may include futures and options, as well as credit default swaps and interest rate swaps.
|
| Performance Past Does Not Indicate Future [Text] |
The fund’s past performance is not a good predictor of the fund’s future performance.
|
| Line Graph [Table Text Block] |
Table Summary
|
Z Class |
Regulatory Benchmark |
Strategy Benchmark |
2/22/21 |
10,000 |
10,000 |
10,000 |
2/28/21 |
10,002 |
9,989 |
9,999 |
5/31/21 |
10,011 |
9,975 |
10,005 |
8/31/21 |
10,038 |
10,138 |
10,007 |
11/30/21 |
10,023 |
10,077 |
10,006 |
2/28/22 |
9,991 |
9,725 |
9,990 |
5/31/22 |
9,922 |
9,154 |
9,990 |
8/31/22 |
9,913 |
8,970 |
9,990 |
11/30/22 |
9,922 |
8,783 |
10,032 |
2/28/23 |
10,100 |
8,779 |
10,135 |
5/31/23 |
10,225 |
8,958 |
10,252 |
8/31/23 |
10,402 |
8,863 |
10,386 |
11/30/23 |
10,571 |
8,887 |
10,535 |
2/29/24 |
10,772 |
9,071 |
10,674 |
5/31/24 |
10,945 |
9,075 |
10,812 |
8/31/24 |
11,164 |
9,510 |
10,978 |
11/30/24 |
11,312 |
9,498 |
11,110 |
2/28/25 |
11,481 |
9,598 |
11,240 |
5/31/25 |
11,606 |
9,571 |
11,355 |
8/31/25 |
11,798 |
9,808 |
11,488 |
11/30/25 |
11,941 |
10,039 |
11,611 |
2/28/26 |
12,081 |
10,199 |
11,723 |
5/31/26 |
12,197 |
10,062 |
11,823 |
|
| Average Annual Return [Table Text Block] |
Table Summary
|
1 Year |
5 Years |
Since Inception 2/22/21 |
Ultra Short-Term Bond Fund (Z Class) |
5.09% |
4.03% |
3.84% |
Bloomberg U.S. Aggregate Bond Index (Regulatory Benchmark) |
5.13 |
0.17 |
0.12 |
Bloomberg Short-Term Government/Corporate Index (Strategy Benchmark) |
4.12 |
3.40 |
3.23 | |
| Performance Inception Date |
Feb. 22, 2021
|
| No Deduction of Taxes [Text Block] |
Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
|
| Updated Performance Information Location [Text Block] |
Updated performance information can be found at www.troweprice.com.
|
| Distribution of Capital [Text Block] |
The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
|
| AssetsNet |
$ 2,934,740,000
|
| Holdings Count | Holding |
541
|
| Advisory Fees Paid, Amount |
$ 3,876,000
|
| InvestmentCompanyPortfolioTurnover |
85.60%
|
| Additional Fund Statistics Significance or Limits [Text Block] |
What are some fund statistics? - Total Net Assets (000s)$2,934,740
- Number of Portfolio Holdings541
|
| Holdings [Text Block] |
Table Summary
Corporate Bonds |
51.4% |
Asset-Backed Securities |
21.5 |
Non-U.S. Government Mortgage-Backed Securities |
9.5 |
Commercial Paper |
8.8 |
U.S. Government Agency Obligations (Excluding Mortgage-Backed) |
4.3 |
U.S. Government & Agency Mortgage-Backed Securities |
3.2 |
U.S. Treasury Obligations |
1.0 |
Foreign Government Obligations & Municipalities |
0.7 |
Securities Lending Collateral |
0.2 |
Short-Term and Other |
-0.6 | |
| Largest Holdings [Text Block] |
Table Summary
U.S. Treasury Notes |
4.3% |
Carvana Auto Receivables Trust |
2.1 |
Federal National Mortgage Assn. |
2.0 |
Structured Agency Credit Risk Debt Notes |
1.8 |
Exeter Automobile Receivables Trust |
1.4 |
Bain Capital Credit |
1.3 |
Federal Home Loan Mortgage |
1.2 |
HCA |
1.1 |
Southern California Edison |
1.0 |
Global Payments |
1.0 | |
| Material Fund Change [Text Block] |
|
| Updated Prospectus Web Address |
www.troweprice.com/paperless
|
