Treasury curve history

One tenor's daily yield over a date range (type=nominal par or real TIPS). Pass tenor=10Y plus optional start/end (YYYY-MM-DD). If tenor2 is given, the series carries the tenor2-minus-tenor spread in basis points instead. Defaults to roughly the last year when start is omitted; the span is capped at 30 years (an earlier start is clamped to that window).

tenorstring required

Canonical tenor, e.g. 10Y or 3M.

Example:10Y

Canonical tenor, e.g. 10Y or 3M.

typestring

nominal (par) or real (TIPS).

tenor2string nullable

Second tenor -> spread series (tenor2 - tenor, bps).

startstring nullable

Example:2024-01-01

endstring nullable

Example:2026-06-30

Response

Date-ordered yield (or spread) series for the tenor.

Example response

{
  "data": {
    "curve_type": "nominal",
    "tenor": "10Y",
    "metric": "yield",
    "count": 250,
    "points": [
      {
        "date": "2026-06-26",
        "value": 4.3
      }
    ]
  },
  "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"
    ]
  }
}

v5

Treasury curve history

Query parameters

Response

Example response