Shareholder Report
|
12 Months Ended |
|
May 31, 2025
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, 2025
|
| 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, 2024 to May 31, 2025. 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.
|
| Shareholder Report Annual or Semi-Annual |
Annual Shareholder Report
|
| 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)
|
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, 2025, as front-end yields fell amid elevated rate volatility, driven by heightened trade policy uncertainty and fiscal policy concerns near the end of the period. The fund’s overweight to investment-grade corporate bonds and corresponding underweight to U.S. Treasuries aided performance relative to its style-specific benchmark, the Bloomberg Short-Term Government/Corporate Index, as corporate credit spreads tightened. Similarly, out-of-benchmark allocations to mortgage-backed securities, asset-backed securities (ABS), and commercial mortgage-backed securities (CMBS) contributed. The fund’s slight overweight duration contributed to performance as front-end yields largely shifted lower over the period. Security selection within investment-grade corporate bonds also generated positive returns. Our selection within Treasuries generated marginally negative returns relative to the benchmark, though our selection within investment-grade corporates more than offset the negative performance impact. The fund seeks a high level of income consistent with minimal fluctuation in principal value and liquidity. The fund’s allocation to investment-grade corporate bonds increased over the reporting period and continued to represent its largest absolute and relative position. We slightly decreased the fund’s allocation to U.S. Treasuries, ABS, and CMBS. While we are primarily a cash bond manager, we occasionally employ the limited use of derivatives in our strategy for hedging purposes. The use of derivatives may include futures and options, as well as credit default 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] |
|
Investor Class |
Regulatory Benchmark |
Strategy Benchmark |
2015 |
10,000 |
10,000 |
10,000 |
2015 |
10,002 |
9,945 |
10,004 |
2015 |
10,002 |
9,988 |
10,010 |
2016 |
10,007 |
10,164 |
10,025 |
2016 |
10,096 |
10,299 |
10,046 |
2016 |
10,146 |
10,539 |
10,069 |
2016 |
10,179 |
10,205 |
10,083 |
2017 |
10,215 |
10,308 |
10,109 |
2017 |
10,275 |
10,462 |
10,125 |
2017 |
10,318 |
10,591 |
10,157 |
2017 |
10,362 |
10,533 |
10,180 |
2018 |
10,389 |
10,360 |
10,207 |
2018 |
10,448 |
10,423 |
10,256 |
2018 |
10,516 |
10,480 |
10,313 |
2018 |
10,564 |
10,391 |
10,366 |
2019 |
10,665 |
10,689 |
10,442 |
2019 |
10,789 |
11,090 |
10,518 |
2019 |
10,885 |
11,546 |
10,597 |
2019 |
10,930 |
11,513 |
10,654 |
2020 |
11,034 |
11,937 |
10,721 |
2020 |
11,027 |
12,134 |
10,789 |
2020 |
11,206 |
12,293 |
10,804 |
2020 |
11,265 |
12,351 |
10,811 |
2021 |
11,308 |
12,102 |
10,818 |
2021 |
11,330 |
12,085 |
10,824 |
2021 |
11,328 |
12,283 |
10,826 |
2021 |
11,325 |
12,209 |
10,825 |
2022 |
11,257 |
11,782 |
10,808 |
2022 |
11,171 |
11,091 |
10,807 |
2022 |
11,174 |
10,868 |
10,807 |
2022 |
11,153 |
10,641 |
10,853 |
2023 |
11,345 |
10,637 |
10,965 |
2023 |
11,476 |
10,854 |
11,091 |
2023 |
11,666 |
10,738 |
11,237 |
2023 |
11,847 |
10,767 |
11,398 |
2024 |
12,088 |
10,991 |
11,547 |
2024 |
12,271 |
10,995 |
11,697 |
2024 |
12,483 |
11,522 |
11,877 |
2024 |
12,663 |
11,507 |
12,019 |
2025 |
12,818 |
11,629 |
12,160 |
2025 |
12,972 |
11,596 |
12,284 |
|
| Average Annual Return [Table Text Block] |
|
1 Year |
5 Years |
10 Years |
Ultra Short-Term Bond Fund (Investor Class) |
5.71% |
3.30% |
2.64% |
Bloomberg U.S. Aggregate Bond Index (Regulatory Benchmark) |
5.46 |
-0.90 |
1.49 |
Bloomberg Short-Term Government/Corporate Index (Strategy Benchmark) |
5.02 |
2.63 |
2.08 | |
| 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 |
$ 2,510,147,000
|
| Holdings Count | Holding |
471
|
| Advisory Fees Paid, Amount |
$ 3,491,000
|
| InvestmentCompanyPortfolioTurnover |
73.40%
|
| Additional Fund Statistics Significance or Limits [Text Block] |
What are some fund statistics? - Total Net Assets (000s)$2,510,147
- Number of Portfolio Holdings471
|
| Holdings [Text Block] |
Corporate Bonds |
51.5% |
Asset-Backed Securities |
25.7 |
Non-U.S. Government Mortgage-Backed Securities |
7.8 |
Commercial Paper |
6.8 |
U.S. Government & Agency Mortgage-Backed Securities |
2.6 |
Foreign Government Obligations & Municipalities |
2.3 |
U.S. Government Agency Obligations (Excluding Mortgage-Backed) |
1.6 |
U.S. Treasury Obligations |
1.0 |
Securities Lending Collateral |
0.1 |
Short-Term and Other |
0.6 | |
| Largest Holdings [Text Block] |
Santander Drive Auto Receivables Trust |
2.3% |
Carvana Auto Receivables Trust |
2.0 |
Federal Home Loan Mortgage |
2.0 |
U.S. Treasury Notes |
1.6 |
Japan Treasury Discount Bill |
1.5 |
Exeter Automobile Receivables Trust |
1.4 |
Verus Securitization Trust |
1.4 |
Drive Auto Receivables Trust |
1.4 |
Conagra Foods |
1.2 |
Structured Agency Credit Risk Debt Notes |
1.1 | |
| 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, 2024 to May 31, 2025. 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.
|
| Shareholder Report Annual or Semi-Annual |
Annual Shareholder Report
|
| 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)
|
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Ultra Short-Term Bond Fund - I Class |
$21 |
0.20% | |
| Expenses Paid, Amount |
$ 21
|
| 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, 2025, as front-end yields fell amid elevated rate volatility, driven by heightened trade policy uncertainty and fiscal policy concerns near the end of the period. The fund’s overweight to investment-grade corporate bonds and corresponding underweight to U.S. Treasuries aided performance relative to its style-specific benchmark, the Bloomberg Short-Term Government/Corporate Index, as corporate credit spreads tightened. Similarly, out-of-benchmark allocations to mortgage-backed securities, asset-backed securities (ABS), and commercial mortgage-backed securities (CMBS) contributed. The fund’s slight overweight duration contributed to performance as front-end yields largely shifted lower over the period. Security selection within investment-grade corporate bonds also generated positive returns. Our selection within Treasuries generated marginally negative returns relative to the benchmark, though our selection within investment-grade corporates more than offset the negative performance impact. The fund seeks a high level of income consistent with minimal fluctuation in principal value and liquidity. The fund’s allocation to investment-grade corporate bonds increased over the reporting period and continued to represent its largest absolute and relative position. We slightly decreased the fund’s allocation to U.S. Treasuries, ABS, and CMBS. While we are primarily a cash bond manager, we occasionally employ the limited use of derivatives in our strategy for hedging purposes. The use of derivatives may include futures and options, as well as credit default 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] |
|
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 |
|
| Average Annual Return [Table Text Block] |
|
1 Year |
5 Years |
Since Inception 7/6/17 |
Ultra Short-Term Bond Fund (I Class) |
5.83% |
3.43% |
3.09% |
Bloomberg U.S. Aggregate Bond Index (Regulatory Benchmark) |
5.46 |
-0.90 |
1.36 |
Bloomberg Short-Term Government/Corporate Index (Strategy Benchmark) |
5.02 |
2.63 |
2.46 | |
| 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 |
$ 2,510,147,000
|
| Holdings Count | Holding |
471
|
| Advisory Fees Paid, Amount |
$ 3,491,000
|
| InvestmentCompanyPortfolioTurnover |
73.40%
|
| Additional Fund Statistics Significance or Limits [Text Block] |
What are some fund statistics? - Total Net Assets (000s)$2,510,147
- Number of Portfolio Holdings471
|
| Holdings [Text Block] |
Corporate Bonds |
51.5% |
Asset-Backed Securities |
25.7 |
Non-U.S. Government Mortgage-Backed Securities |
7.8 |
Commercial Paper |
6.8 |
U.S. Government & Agency Mortgage-Backed Securities |
2.6 |
Foreign Government Obligations & Municipalities |
2.3 |
U.S. Government Agency Obligations (Excluding Mortgage-Backed) |
1.6 |
U.S. Treasury Obligations |
1.0 |
Securities Lending Collateral |
0.1 |
Short-Term and Other |
0.6 | |
| Largest Holdings [Text Block] |
Santander Drive Auto Receivables Trust |
2.3% |
Carvana Auto Receivables Trust |
2.0 |
Federal Home Loan Mortgage |
2.0 |
U.S. Treasury Notes |
1.6 |
Japan Treasury Discount Bill |
1.5 |
Exeter Automobile Receivables Trust |
1.4 |
Verus Securitization Trust |
1.4 |
Drive Auto Receivables Trust |
1.4 |
Conagra Foods |
1.2 |
Structured Agency Credit Risk Debt Notes |
1.1 | |
| 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, 2024 to May 31, 2025. 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.
|
| Shareholder Report Annual or Semi-Annual |
Annual Shareholder Report
|
| 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)
|
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, 2025, as front-end yields fell amid elevated rate volatility, driven by heightened trade policy uncertainty and fiscal policy concerns near the end of the period. The fund’s overweight to investment-grade corporate bonds and corresponding underweight to U.S. Treasuries aided performance relative to its style-specific benchmark, the Bloomberg Short-Term Government/Corporate Index, as corporate credit spreads tightened. Similarly, out-of-benchmark allocations to mortgage-backed securities, asset-backed securities (ABS), and commercial mortgage-backed securities (CMBS) contributed. The fund’s slight overweight duration contributed to performance as front-end yields largely shifted lower over the period. Security selection within investment-grade corporate bonds also generated positive returns. Our selection within Treasuries generated marginally negative returns relative to the benchmark, though our selection within investment-grade corporates more than offset the negative performance impact. The fund seeks a high level of income consistent with minimal fluctuation in principal value and liquidity. The fund’s allocation to investment-grade corporate bonds increased over the reporting period and continued to represent its largest absolute and relative position. We slightly decreased the fund’s allocation to U.S. Treasuries, ABS, and CMBS. While we are primarily a cash bond manager, we occasionally employ the limited use of derivatives in our strategy for hedging purposes. The use of derivatives may include futures and options, as well as credit default 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] |
|
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 |
|
| Average Annual Return [Table Text Block] |
|
1 Year |
Since Inception 2/22/21 |
Ultra Short-Term Bond Fund (Z Class) |
6.04% |
3.55% |
Bloomberg U.S. Aggregate Bond Index (Regulatory Benchmark) |
5.46 |
-1.02 |
Bloomberg Short-Term Government/Corporate Index (Strategy Benchmark) |
5.02 |
3.02 | |
| 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 |
$ 2,510,147,000
|
| Holdings Count | Holding |
471
|
| Advisory Fees Paid, Amount |
$ 3,491,000
|
| InvestmentCompanyPortfolioTurnover |
73.40%
|
| Additional Fund Statistics Significance or Limits [Text Block] |
What are some fund statistics? - Total Net Assets (000s)$2,510,147
- Number of Portfolio Holdings471
|
| Holdings [Text Block] |
Corporate Bonds |
51.5% |
Asset-Backed Securities |
25.7 |
Non-U.S. Government Mortgage-Backed Securities |
7.8 |
Commercial Paper |
6.8 |
U.S. Government & Agency Mortgage-Backed Securities |
2.6 |
Foreign Government Obligations & Municipalities |
2.3 |
U.S. Government Agency Obligations (Excluding Mortgage-Backed) |
1.6 |
U.S. Treasury Obligations |
1.0 |
Securities Lending Collateral |
0.1 |
Short-Term and Other |
0.6 | |
| Largest Holdings [Text Block] |
Santander Drive Auto Receivables Trust |
2.3% |
Carvana Auto Receivables Trust |
2.0 |
Federal Home Loan Mortgage |
2.0 |
U.S. Treasury Notes |
1.6 |
Japan Treasury Discount Bill |
1.5 |
Exeter Automobile Receivables Trust |
1.4 |
Verus Securitization Trust |
1.4 |
Drive Auto Receivables Trust |
1.4 |
Conagra Foods |
1.2 |
Structured Agency Credit Risk Debt Notes |
1.1 | |
| Material Fund Change [Text Block] |
|
| Updated Prospectus Web Address |
www.troweprice.com/paperless
|
