TIPS index ratio + inflation-adjusted principal by CUSIP
The daily index ratio and inflation-adjusted principal for one Treasury Inflation-Protected Security (TIPS), computed from CPI-U (all urban consumers, not seasonally adjusted) using the standard Treasury reference-CPI convention: the reference CPI for the 1st of a month equals CPI-U three months prior, interpolated linearly within the month; the index ratio is that reference CPI divided by the reference CPI on the security's dated date. Omit date for today, or pass a date (YYYY-MM-DD). If the required CPI-U month is unpublished (e.g. the 2025 data gap), index_ratio is null and cpi_available is false. Sources: US Treasury Fiscal Data (dated-date reference CPI, CC0) and CPI-U (US Bureau of Labor Statistics).
Path parameters
9-character TIPS CUSIP.
9-character TIPS CUSIP.
Query parameters
Valuation date YYYY-MM-DD (default: today).
Valuation date YYYY-MM-DD (default: today).
Response
Index ratio and inflation-adjusted principal for the CUSIP.
Example response
{
"data": {
"cusip": "912810UH9",
"security_term": "9-Year 10-Month",
"dated_date": "2026-01-15",
"ref_cpi_dated": 250,
"as_of": "2026-07-01",
"reference_cpi": 300,
"index_ratio": 1.2,
"inflation_adjusted_principal_per_100": 120,
"cpi_available": true
},
"meta": {
"endpoint": "/api/v1/fred/us/cpi",
"data_time": "2026-04-16T14:30:00Z",
"response_time": "2026-04-16T14:30:12Z",
"provider": "Sugra API v1.0.1",
"source": "sugra_crypto",
"attribution": "Short interest and Reg SHO daily short volume data is owned by and sourced from FINRA (Financial Industry Regulatory Authority).",
"fallback_chain": [
"sugra_crypto",
"sugra_finance"
]
}
}