Market Yield on U.S. Treasury Securities at 1-Month Constant Maturity, Quoted on an Investment Basis

WGS1MOratesFree tier

Series IDWGS1MO
UnitsPercent
FrequencyWeekly, Ending Friday
Categoryrates
Latest observation2026-10-16
HistoryPoint-in-time: every value as first published plus each revision, so backtests see only what was known on the day

Latest reading

The latest Market Yield on U.S. Treasury Securities at 1-Month Constant Maturity, Quoted on an Investment Basis observation, for 2026-10-16, is 4.13 Percent, up from 4.09 for 2026-10-09. It has not been revised since it was first published. 0.1% of observations in this history were revised after first release.

Latest observation2026-10-16
Latest value4.13 Percent
Previous4.09 (2026-10-09)
Change0.04 (+1.0%)
First published value4.13
Last release2026-10-19
Vintages stored1,311
Observations1,316

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df = yf.Client().macro("WGS1MO")
df.tail()

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