{
  "version": "2026-09-20",
  "id": "avg-rate-bills",
  "label": "Average interest rate, Treasury bills",
  "unit": "percent",
  "frequency": "monthly",
  "decimals": 3,
  "provider": "fiscal",
  "sourceLabel": "U.S. Treasury, Fiscal Data: Average Interest Rates on U.S. Treasury Securities",
  "sourceUrl": "https://fiscaldata.treasury.gov/datasets/average-interest-rates-treasury-securities/",
  "fetchedAt": "2026-09-20",
  "lastObservation": "2026-08-31",
  "points": [
    [
      "2010-01-31",
      0.238
    ],
    [
      "2010-02-28",
      0.227
    ],
    [
      "2010-03-31",
      0.227
    ],
    [
      "2010-04-30",
      0.234
    ],
    [
      "2010-05-31",
      0.241
    ],
    [
      "2010-06-30",
      0.221
    ],
    [
      "2010-07-31",
      0.221
    ],
    [
      "2010-08-31",
      0.216
    ],
    [
      "2010-09-30",
      0.208
    ],
    [
      "2010-10-31",
      0.204
    ],
    [
      "2010-11-30",
      0.197
    ],
    [
      "2010-12-31",
      0.192
    ],
    [
      "2011-01-31",
      0.197
    ],
    [
      "2011-02-28",
      0.195
    ],
    [
      "2011-03-31",
      0.179
    ],
    [
      "2011-04-30",
      0.164
    ],
    [
      "2011-05-31",
      0.149
    ],
    [
      "2011-06-30",
      0.129
    ],
    [
      "2011-07-31",
      0.12
    ],
    [
      "2011-08-31",
      0.111
    ],
    [
      "2011-09-30",
      0.093
    ],
    [
      "2011-10-31",
      0.086
    ],
    [
      "2011-11-30",
      0.076
    ],
    [
      "2011-12-31",
      0.069
    ],
    [
      "2012-01-31",
      0.066
    ],
    [
      "2012-02-29",
      0.078
    ],
    [
      "2012-03-31",
      0.093
    ],
    [
      "2012-04-30",
      0.101
    ],
    [
      "2012-05-31",
      0.11
    ],
    [
      "2012-06-30",
      0.115
    ],
    [
      "2012-07-31",
      0.124
    ],
    [
      "2012-08-31",
      0.131
    ],
    [
      "2012-09-30",
      0.131
    ],
    [
      "2012-10-31",
      0.135
    ],
    [
      "2012-11-30",
      0.141
    ],
    [
      "2012-12-31",
      0.127
    ],
    [
      "2013-01-31",
      0.124
    ],
    [
      "2013-02-28",
      0.124
    ],
    [
      "2013-03-31",
      0.122
    ],
    [
      "2013-04-30",
      0.115
    ],
    [
      "2013-05-31",
      0.101
    ],
    [
      "2013-06-30",
      0.096
    ],
    [
      "2013-07-31",
      0.09
    ],
    [
      "2013-08-31",
      0.084
    ],
    [
      "2013-09-30",
      0.074
    ],
    [
      "2013-10-31",
      0.087
    ],
    [
      "2013-11-30",
      0.082
    ],
    [
      "2013-12-31",
      0.083
    ],
    [
      "2014-01-31",
      0.085
    ],
    [
      "2014-02-28",
      0.084
    ],
    [
      "2014-03-31",
      0.084
    ],
    [
      "2014-04-30",
      0.08
    ],
    [
      "2014-05-31",
      0.072
    ],
    [
      "2014-06-30",
      0.068
    ],
    [
      "2014-07-31",
      0.066
    ],
    [
      "2014-08-31",
      0.062
    ],
    [
      "2014-09-30",
      0.057
    ],
    [
      "2014-10-31",
      0.056
    ],
    [
      "2014-11-30",
      0.059
    ],
    [
      "2014-12-31",
      0.063
    ],
    [
      "2015-01-31",
      0.07
    ],
    [
      "2015-02-28",
      0.071
    ],
    [
      "2015-03-31",
      0.078
    ],
    [
      "2015-04-30",
      0.088
    ],
    [
      "2015-05-31",
      0.09
    ],
    [
      "2015-06-30",
      0.093
    ],
    [
      "2015-07-31",
      0.099
    ],
    [
      "2015-08-31",
      0.121
    ],
    [
      "2015-09-30",
      0.136
    ],
    [
      "2015-10-31",
      0.144
    ],
    [
      "2015-11-30",
      0.161
    ],
    [
      "2015-12-31",
      0.235
    ],
    [
      "2016-01-31",
      0.292
    ],
    [
      "2016-02-29",
      0.331
    ],
    [
      "2016-03-31",
      0.366
    ],
    [
      "2016-04-30",
      0.385
    ],
    [
      "2016-05-31",
      0.395
    ],
    [
      "2016-06-30",
      0.386
    ],
    [
      "2016-07-31",
      0.396
    ],
    [
      "2016-08-31",
      0.394
    ],
    [
      "2016-09-30",
      0.4
    ],
    [
      "2016-10-31",
      0.416
    ],
    [
      "2016-11-30",
      0.442
    ],
    [
      "2016-12-31",
      0.504
    ],
    [
      "2017-01-31",
      0.543
    ],
    [
      "2017-02-28",
      0.571
    ],
    [
      "2017-03-31",
      0.664
    ],
    [
      "2017-04-30",
      0.731
    ],
    [
      "2017-05-31",
      0.798
    ],
    [
      "2017-06-30",
      0.895
    ],
    [
      "2017-07-31",
      0.972
    ],
    [
      "2017-08-31",
      1.035
    ],
    [
      "2017-09-30",
      1.071
    ],
    [
      "2017-10-31",
      1.099
    ],
    [
      "2017-11-30",
      1.165
    ],
    [
      "2017-12-31",
      1.248
    ],
    [
      "2018-01-31",
      1.338
    ],
    [
      "2018-02-28",
      1.442
    ],
    [
      "2018-03-31",
      1.6
    ],
    [
      "2018-04-30",
      1.694
    ],
    [
      "2018-05-31",
      1.808
    ],
    [
      "2018-06-30",
      1.891
    ],
    [
      "2018-07-31",
      1.969
    ],
    [
      "2018-08-31",
      2.042
    ],
    [
      "2018-09-30",
      2.118
    ],
    [
      "2018-10-31",
      2.203
    ],
    [
      "2018-11-30",
      2.293
    ],
    [
      "2018-12-31",
      2.368
    ],
    [
      "2019-01-31",
      2.437
    ],
    [
      "2019-02-28",
      2.467
    ],
    [
      "2019-03-31",
      2.49
    ],
    [
      "2019-04-30",
      2.488
    ],
    [
      "2019-05-31",
      2.474
    ],
    [
      "2019-06-30",
      2.417
    ],
    [
      "2019-07-31",
      2.341
    ],
    [
      "2019-08-31",
      2.226
    ],
    [
      "2019-09-30",
      2.136
    ],
    [
      "2019-10-31",
      1.975
    ],
    [
      "2019-11-30",
      1.84
    ],
    [
      "2019-12-31",
      1.761
    ],
    [
      "2020-01-31",
      1.683
    ],
    [
      "2020-02-29",
      1.643
    ],
    [
      "2020-03-31",
      1.216
    ],
    [
      "2020-04-30",
      0.596
    ],
    [
      "2020-05-31",
      0.403
    ],
    [
      "2020-06-30",
      0.328
    ],
    [
      "2020-07-31",
      0.266
    ],
    [
      "2020-08-31",
      0.207
    ],
    [
      "2020-09-30",
      0.179
    ],
    [
      "2020-10-31",
      0.161
    ],
    [
      "2020-11-30",
      0.146
    ],
    [
      "2020-12-31",
      0.121
    ],
    [
      "2021-01-31",
      0.109
    ],
    [
      "2021-02-28",
      0.09
    ],
    [
      "2021-03-31",
      0.076
    ],
    [
      "2021-04-30",
      0.06
    ],
    [
      "2021-05-31",
      0.049
    ],
    [
      "2021-06-30",
      0.045
    ],
    [
      "2021-07-31",
      0.047
    ],
    [
      "2021-08-31",
      0.051
    ],
    [
      "2021-09-30",
      0.053
    ],
    [
      "2021-10-31",
      0.056
    ],
    [
      "2021-11-30",
      0.061
    ],
    [
      "2021-12-31",
      0.071
    ],
    [
      "2022-01-31",
      0.103
    ],
    [
      "2022-02-28",
      0.185
    ],
    [
      "2022-03-31",
      0.329
    ],
    [
      "2022-04-30",
      0.505
    ],
    [
      "2022-05-31",
      0.728
    ],
    [
      "2022-06-30",
      1.073
    ],
    [
      "2022-07-31",
      1.511
    ],
    [
      "2022-08-31",
      1.971
    ],
    [
      "2022-09-30",
      2.453
    ],
    [
      "2022-10-31",
      2.924
    ],
    [
      "2022-11-30",
      3.456
    ],
    [
      "2022-12-31",
      3.891
    ],
    [
      "2023-01-31",
      4.242
    ],
    [
      "2023-02-28",
      4.475
    ],
    [
      "2023-03-31",
      4.634
    ],
    [
      "2023-04-30",
      4.739
    ],
    [
      "2023-05-31",
      4.991
    ],
    [
      "2023-06-30",
      5.116
    ],
    [
      "2023-07-31",
      5.219
    ],
    [
      "2023-08-31",
      5.319
    ],
    [
      "2023-09-30",
      5.38
    ],
    [
      "2023-10-31",
      5.437
    ],
    [
      "2023-11-30",
      5.451
    ],
    [
      "2023-12-31",
      5.437
    ],
    [
      "2024-01-31",
      5.411
    ],
    [
      "2024-02-29",
      5.384
    ],
    [
      "2024-03-31",
      5.369
    ],
    [
      "2024-04-30",
      5.357
    ],
    [
      "2024-05-31",
      5.352
    ],
    [
      "2024-06-30",
      5.351
    ],
    [
      "2024-07-31",
      5.345
    ],
    [
      "2024-08-31",
      5.288
    ],
    [
      "2024-09-30",
      5.154
    ],
    [
      "2024-10-31",
      4.901
    ],
    [
      "2024-11-30",
      4.741
    ],
    [
      "2024-12-31",
      4.586
    ],
    [
      "2025-01-31",
      4.455
    ],
    [
      "2025-02-28",
      4.399
    ],
    [
      "2025-03-31",
      4.359
    ],
    [
      "2025-04-30",
      4.335
    ],
    [
      "2025-05-31",
      4.316
    ],
    [
      "2025-06-30",
      4.306
    ],
    [
      "2025-07-31",
      4.314
    ],
    [
      "2025-08-31",
      4.283
    ],
    [
      "2025-09-30",
      4.187
    ],
    [
      "2025-10-31",
      4.075
    ],
    [
      "2025-11-30",
      3.983
    ],
    [
      "2025-12-31",
      3.86
    ],
    [
      "2026-01-31",
      3.76
    ],
    [
      "2026-02-28",
      3.72
    ],
    [
      "2026-03-31",
      3.702
    ],
    [
      "2026-04-30",
      3.696
    ],
    [
      "2026-05-31",
      3.69
    ],
    [
      "2026-06-30",
      3.706
    ],
    [
      "2026-07-31",
      3.758
    ],
    [
      "2026-08-31",
      3.788
    ]
  ]
}