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3-Month Treasury Bill Primary Market Yield Rate (end of period) (monthly)

Treasury bill yields. Per cent, monthly.

Level, monthlyLevel, annual

Data source: Central Bank of Sri Lanka, Interest Rates - Monthly (2003 to Latest (12 Oct 2026)

Macro Lab · LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M · CC BY 4.0

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About this series

  • Source Central Bank of Sri Lanka, compiled by Macro Lab
  • Unit Per cent
  • Date range Jan 2003 – Aug 2026
  • Last checked 12 Oct 2026

Checks: 10 recorded for this series, listed below.

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Details

Name in the warehouse
3-Month Treasury Bill Primary Market Yield Rate (end of period) (monthly)
Read from
CBSL statistical tables (Central Bank of Sri Lanka)
Source page
https://www.cbsl.gov.lk/en/statistics/statistical-tables
Notes
CBSL table4.04 'Interest Rates - Monthly'. Not held anywhere else in the warehouse (CBSL audit, 2026-09-22).

Source documents

Interest Rates - Monthly (2003 to LatestCBSL · 12 Oct 2026 · 280 values

Vintages

One vintage so far, published 12 Oct 2026. Revisions show here once a later release changes a value.

Related series

Source discrepancies

What the warehouse found when it checked this series: the same figure from two agencies, splice overlaps, published rates against ones recalculated from the index, and outliers.

  • Not yet explainedAug 2026

    This series reads 9.06; the same figure from the other source reads 10.21. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 9.06 and 10.21, difference −1.15.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2026-07-09)

  • A true readingJun 2012

    This series reads 12.61; the same figure from the other source reads 11.12. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 12.61 and 11.12, difference 1.49.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2012-06-29)

    LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M, 2012-06: end-of-period reading 12.61% vs nearest weekly primary auction 11.12%, diff +1.49pp. Genuine yield movement between the auction date and the table's own end-of-period reading, larger than the check's 1pp tolerance; only 10 of ~750 compared periods fall outside the band (~1.3%). Not a data or check error.

  • A true readingJul 2012

    This series reads 12.87; the same figure from the other source reads 11.35. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 12.87 and 11.35, difference 1.52.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2012-07-27)

    LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M, 2012-07: end-of-period reading 12.87% vs nearest weekly primary auction 11.35%, diff +1.52pp. Genuine yield movement between the auction date and the table's own end-of-period reading, larger than the check's 1pp tolerance; only 10 of ~750 compared periods fall outside the band (~1.3%). Not a data or check error.

  • A true readingAug 2012

    This series reads 13.07; the same figure from the other source reads 11.41. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 13.07 and 11.41, difference 1.66.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2012-08-31)

    LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M, 2012-08: end-of-period reading 13.07% vs nearest weekly primary auction 11.41%, diff +1.66pp. Genuine yield movement between the auction date and the table's own end-of-period reading, larger than the check's 1pp tolerance; only 10 of ~750 compared periods fall outside the band (~1.3%). Not a data or check error.

  • A true readingSep 2012

    This series reads 12.57; the same figure from the other source reads 11.3. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 12.57 and 11.3, difference 1.27.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2012-09-28)

    LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M, 2012-09: end-of-period reading 12.57% vs nearest weekly primary auction 11.30%, diff +1.27pp. Genuine yield movement between the auction date and the table's own end-of-period reading, larger than the check's 1pp tolerance; only 10 of ~750 compared periods fall outside the band (~1.3%). Not a data or check error.

  • A true readingOct 2012

    This series reads 11.97; the same figure from the other source reads 10.66. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 11.97 and 10.66, difference 1.31.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2012-10-19)

    LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M, 2012-10: end-of-period reading 11.97% vs nearest weekly primary auction 10.66%, diff +1.31pp. Genuine yield movement between the auction date and the table's own end-of-period reading, larger than the check's 1pp tolerance; only 10 of ~750 compared periods fall outside the band (~1.3%). Not a data or check error.

  • A true readingNov 2012

    This series reads 12.09; the same figure from the other source reads 10.79. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 12.09 and 10.79, difference 1.3.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2012-11-30)

    LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M, 2012-11: end-of-period reading 12.09% vs nearest weekly primary auction 10.79%, diff +1.30pp. Genuine yield movement between the auction date and the table's own end-of-period reading, larger than the check's 1pp tolerance; only 10 of ~750 compared periods fall outside the band (~1.3%). Not a data or check error.

  • A true readingJun 2022

    This series reads 23.85; the same figure from the other source reads 20.73. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 23.85 and 20.73, difference 3.12.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2022-06-24)

    LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M, 2022-06: end-of-period reading 23.85% vs nearest weekly primary auction 20.73%, diff +3.12pp. Genuine yield movement between the auction date and the table's own end-of-period reading, larger than the check's 1pp tolerance; only 10 of ~750 compared periods fall outside the band (~1.3%). Not a data or check error.

  • A true readingAug 2022

    This series reads 32.89; the same figure from the other source reads 30.51. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 32.89 and 30.51, difference 2.38.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2022-08-26)

    LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M, 2022-08: end-of-period reading 32.89% vs nearest weekly primary auction 30.51%, diff +2.38pp. Genuine yield movement between the auction date and the table's own end-of-period reading, larger than the check's 1pp tolerance; only 10 of ~750 compared periods fall outside the band (~1.3%). Not a data or check error.

  • A true readingJan 2024

    This series reads 11.97; the same figure from the other source reads 13.35. Compared with LK.DEBT.TBILL.91D.YIELD.W.

    Two agencies: 11.97 and 13.35, difference −1.38.

    T-bill 3M end-of-period yield (table4.04) vs nearest weekly primary-market yield (2024-01-24)

    LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M, 2024-01: end-of-period reading 11.97% vs nearest weekly primary auction 13.35%, diff -1.38pp. Genuine yield movement between the auction date and the table's own end-of-period reading, larger than the check's 1pp tolerance; only 10 of ~750 compared periods fall outside the band (~1.3%). Not a data or check error.

Checks not yet explained first. 7 more checks of a true reading.