Three-month Treasury bill yield by calendar year

Name: Three-month Treasury bill yield by calendar year
Creator: Strasmore
Published: 2026-08-14
License: https://www.strasmore.com/terms/

Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-08-14, from Risk-free rate in the Sharpe ratio.

as of 2026-08-14 ranking 22×4read in context →

Three-month Treasury bill yield by calendar year — 22 rows by 4 columns, computed 2026-08-14 from US exchange, SIP and OPRA data.
year	avg_bill_pct	low_bill_pct	high_bill_pct
2005	3.22	2.31	4.08
2006	4.85	4.16	5.13
2007	4.48	2.87	5.19
2008	1.4	0	3.27
2009	0.15	0.02	0.32
2010	0.14	0.04	0.18
2011	0.05	0	0.16
2012	0.09	0.01	0.14
2013	0.06	0	0.14
2014	0.03	0.01	0.08
2015	0.05	0	0.29
2016	0.32	0.18	0.55
2017	0.95	0.5	1.47
2018	1.97	1.39	2.45
2019	2.11	1.52	2.49
2020	0.36	0	1.59
2021	0.04	0.01	0.09
2022	2.09	0.08	4.46
2023	5.28	4.52	5.63
2024	5.18	4.31	5.52
2025	4.21	3.62	4.46
2026	3.74	3.62	3.96

Rows × columns: 22 × 4
Computed: 2026-08-14
Completeness: No missing values
Source: US exchange, SIP and OPRA market data
Licence: Strasmore terms · free, no signup
Formats: JSON · CSV · the SQL below

What each column holds

Column definitions for Three-month Treasury bill yield by calendar year, derived from the stored result.
Column	Type	Range	Notes
`year`	text	22 distinct values (2005, 2006, 2007…)
`avg_bill_pct`	number	0.03 to 5.28	percent
`low_bill_pct`	number	0 to 4.52	percent
`high_bill_pct`	number	0.08 to 5.63	percent

Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on 2026-08-14, and the query below is what returned them.

the exact SQL behind every number

SELECT
    toString(toYear(date))                  AS year,
    round(avg(toFloat64(yield_3_month)), 2) AS avg_bill_pct,
    round(min(toFloat64(yield_3_month)), 2) AS low_bill_pct,
    round(max(toFloat64(yield_3_month)), 2) AS high_bill_pct
FROM global_markets.treasury_yields
WHERE date >= '2005-01-01'
  AND yield_3_month IS NOT NULL
GROUP BY year
ORDER BY year

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