Securities & Savings Bonds Datasets — U.S. Treasury Fiscal Data

Treasury Securities Auctions Data

Endpoint: /v1/accounting/od/auctions_query
Frequency: As Needed
Date Range: November 1979 to present

Historical data on Treasury securities auctions including bills, notes, bonds, TIPS, and FRNs.

Key fields:

Field	Type	Description
`record_date`	DATE	Auction date
`security_type`	STRING	Bill, Note, Bond, TIPS, FRN
`security_term`	STRING	e.g., "4-Week", "2-Year", "10-Year"
`cusip`	STRING	CUSIP identifier
`offering_amt`	CURRENCY	Amount offered
`accepted_comp_bid_rate_amt`	PERCENTAGE	High accepted competitive bid rate
`bid_to_cover_ratio`	NUMBER	Bid-to-cover ratio
`total_accepted_amt`	CURRENCY	Total accepted amount
`indirect_bid_pct_accepted`	PERCENTAGE	Indirect bidder percentage
`issue_date`	DATE	Issue/settlement date
`maturity_date`	DATE	Maturity date

python

# Get recent 10-year Treasury note auctions
resp = requests.get(
    "https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/od/auctions_query",
    params={
        "filter": "security_type:eq:Note,security_term:eq:10-Year",
        "sort": "-record_date",
        "page[size]": 10
    }
)
df = pd.DataFrame(resp.json()["data"])

# Get all auctions in 2024
resp = requests.get(
    "https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/od/auctions_query",
    params={
        "filter": "record_date:gte:2024-01-01,record_date:lte:2024-12-31",
        "sort": "-record_date",
        "page[size]": 10000
    }
)

Treasury Securities Upcoming Auctions

Endpoint: /v1/accounting/od/upcoming_auctions
Frequency: As Needed
Date Range: March 2024 to present

Announced but not yet settled auction schedule.

Key fields:

Field	Type	Description
`auction_date`	DATE	Scheduled auction date
`security_type`	STRING	Security type
`security_term`	STRING	Maturity term
`offering_amt`	CURRENCY	Announced offering amount

python

# Get upcoming auctions
resp = requests.get(
    "https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v1/accounting/od/upcoming_auctions",
    params={"sort": "auction_date"}
)
upcoming = pd.DataFrame(resp.json()["data"])
print(upcoming[["auction_date", "security_type", "security_term", "offering_amt"]])

Record-Setting Treasury Securities Auction Data

Frequency: As Needed

Tracks auction records (largest, highest rate, lowest rate, etc.) for each security type and term.

Treasury Securities Buybacks

Frequency: As Needed (2 data tables)
Date Range: March 2000 to present

Data on Treasury's secondary market buyback (repurchase) operations. Active since the program's relaunch in 2024.

I Bonds Interest Rates

Endpoint: /v2/accounting/od/i_bond_interest_rates
Frequency: Semi-Annual (May and November)
Date Range: September 1998 to present

Composite interest rates for Series I Savings Bonds, including fixed rate and inflation rate components.

Key fields:

Field	Type	Description
`effective_date`	DATE	Rate effective date
`announcement_date`	DATE	Announcement date
`fixed_rate`	PERCENTAGE	Fixed rate component
`semiannual_inflation_rate`	PERCENTAGE	Semi-annual CPI-U inflation rate
`earnings_rate_i_bonds`	PERCENTAGE	Combined composite rate

python

# Current I Bond rates
resp = requests.get(
    "https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v2/accounting/od/i_bond_interest_rates",
    params={"sort": "-effective_date", "page[size]": 5}
)
df = pd.DataFrame(resp.json()["data"])
latest = df.iloc[0]
print(f"Current I Bond rate: {latest['earnings_rate_i_bonds']}%")
print(f"  Fixed rate: {latest['fixed_rate']}%")
print(f"  Inflation component: {latest['semiannual_inflation_rate']}%")

U.S. Treasury Savings Bonds: Issues, Redemptions & Maturities

Endpoint: /v1/accounting/od/sb_issues_redemptions (3 tables)
Frequency: Monthly
Date Range: September 1998 to present

Monthly statistics on Series EE, Series I, and Series HH savings bonds outstanding, issued, and redeemed.

Key fields:

Field	Type	Description
`record_date`	DATE	Month end date
`series_cd`	STRING	Bond series (EE, I, HH)
`issued_amt`	CURRENCY	Amount issued
`redeemed_amt`	CURRENCY	Amount redeemed
`matured_amt`	CURRENCY	Amount matured
`outstanding_amt`	CURRENCY	Total outstanding

Savings Bonds Value Files

Frequency: Semi-Annual
Date Range: May 1992 to present

Files for calculating current redemption values of savings bonds.

Accrual Savings Bonds Redemption Tables (Discontinued)

Endpoint: /v2/accounting/od/redemption_tables
Frequency: Discontinued (last updated 2022)
Date Range: March 1999 – May 2023

Monthly redemption value tables for historical savings bonds.

Savings Bonds Securities Sold (Discontinued)

Frequency: Discontinued
Date Range: October 1998 – June 2022

State and Local Government Series (SLGS) Securities

Endpoint: /v1/accounting/od/slgs_statistics
Frequency: Daily
Date Range: October 1998 to present

SLGS securities outstanding data — non-marketable special purpose securities sold to state and local governments.

Monthly State and Local Government Series (SLGS) Securities Program

Frequency: Monthly
Date Range: March 2014 to present

Monthly statistics on the SLGS program.

Electronic Securities Transactions

Frequency: Monthly (8 data tables)
Date Range: January 2000 to present

Electronic book-entry transactions for Treasury securities in the TRADES (Treasury/Reserve Automated Debt Entry System) system.

Federal Investments Program

Interest Cost by Fund

Frequency: Monthly
Date Range: October 2001 to present

Monthly interest cost by government trust fund for invested federal funds.

Principal Outstanding

Frequency: Monthly (2 tables)
Date Range: October 2017 to present

Statement of Account

Frequency: Monthly (3 tables)
Date Range: November 2011 to present

Federal Borrowings Program

Distribution and Transaction Data

Frequency: Daily (2 tables)
Date Range: September 2000 to present

Interest on Uninvested Funds

Frequency: Quarterly
Date Range: December 2016 to present

Summary General Ledger Balances Report

Frequency: Monthly (2 tables)
Date Range: October 2005 to present