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Bill yield, 91 days

Treasury bill yields. Per cent, weekly.

Data source: Central Bank of Sri Lanka, CBSL Data Library rate reports

Macro Lab · LK.DEBT.TBILL.91D.YIELD.W · 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 5 Jan 2007 – 9 Jul 2026
  • Last checked 7 Oct 2026

Checks: 15 recorded for this series, listed below.

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Details

Name in the warehouse
Bill yield, 91 days
Read from
CBSL Data Library rate reports (Central Bank of Sri Lanka)
Source page
https://www.cbsl.lk/eResearch/MoneyMarketRatesDefault.aspx
Notes
Weekly rates on government securities (CBSL report page).

Source documents

No file is recorded for these values.

Vintages

3 vintages, the latest published 7 Oct 2026.

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 explained1 Aug 2026

    This series reads 10.21; the same figure from the other source reads 9.06. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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 reading1 Jun 2012

    This series reads 11.12; the same figure from the other source reads 12.61. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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 reading1 Jul 2012

    This series reads 11.35; the same figure from the other source reads 12.87. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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 reading1 Aug 2012

    This series reads 11.41; the same figure from the other source reads 13.07. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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 reading1 Sep 2012

    This series reads 11.3; the same figure from the other source reads 12.57. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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 reading1 Oct 2012

    This series reads 10.66; the same figure from the other source reads 11.97. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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 reading1 Nov 2012

    This series reads 10.79; the same figure from the other source reads 12.09. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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 reading1 Jun 2022

    This series reads 20.73; the same figure from the other source reads 23.85. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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 reading1 Aug 2022

    This series reads 30.51; the same figure from the other source reads 32.89. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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 reading1 Jan 2024

    This series reads 13.35; the same figure from the other source reads 11.97. Compared with LK.DEBT.TBILL.TBILL_3M_YIELD_EOP.M.

    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.

  • For information

    This series and the same figure from another source differ over the period they share. Compared with LK.DEBT.PDMO_TBILL.1_7D.AVG.YIELD.D.

    Two agencies.

    PDMO daily two-way avg yield (1_7D) vs held CBSL weekly yield (91D): 331 shared dates, mean diff -2.276pp (range -13.244..-0.036pp) - different measurement basis, kept as separate canonical series, not a mirror pair

    By design: PDMO's daily two-way dealer quotes (secondary market) vs CBSL's weekly primary-market T-bill yield - different measurement basis, both kept canonical. Mean gap -0.56pp over 32 shared dates. This check always logs a summary row; it is not reporting an error.

  • For information

    This series and the same figure from another source differ over the period they share. Compared with LK.DEBT.PDMO_TBILL.3M.AVG.YIELD.D.

    Two agencies.

    PDMO daily two-way avg yield (3M) vs held CBSL weekly yield (91D): 331 shared dates, mean diff -0.449pp (range -5.106..+0.549pp) - different measurement basis, kept as separate canonical series, not a mirror pair

    By design, same as LK.DEBT.PDMO_TBILL.1_7D.AVG.YIELD.D: different measurement basis (daily secondary-market dealer quotes vs weekly primary-market yield). Mean gap -0.20pp over 32 shared dates.

  • For information21 Sep 2018

    Checked against another source.

    Placeholder zero: 0.

    LK.DEBT.TBILL.91D.YIELD.W: 0 in a series that cannot be 0 (government security yield), dropped

  • For information5 Oct 2018

    Checked against another source.

    Placeholder zero: 0.

    LK.DEBT.TBILL.91D.YIELD.W: 0 in a series that cannot be 0 (government security yield), dropped

  • For information2 Nov 2018

    Checked against another source.

    Placeholder zero: 0.

    LK.DEBT.TBILL.91D.YIELD.W: 0 in a series that cannot be 0 (government security yield), dropped

Checks not yet explained first. 12 more checks.