Interest rate

{
  "code": "aaa_3m",
  "name": "3-month rate, AAA bonds",
  "description": "Euro area yield curve",
  "unit": "%",
  "cadence": "daily",
  "publisher": "ECB",
  "credit": "Source: ECB",
  "latest": { "day": "2026-09-29", "rate": 2.525 },
  "changed_on": "2026-09-29",
  "change_bp": { "week": -4.3, "three_months": 25.5, "month": null, "year": null },
  "year": {
    "low": { "day": "2025-10-21", "rate": 1.87 },
    "high": { "day": "2026-09-23", "rate": 2.641 }
  },
  "history": [
    { "day": "2026-09-28", "rate": 2.538 },
    { "day": "2026-09-29", "rate": 2.525 }
  ]
}

• The rates are the European Central Bank's own statistics, free to reuse with the credit Source: ECB:

  code	What it is	cadence
  estr	€STR, the euro short-term rate: what banks pay to borrow overnight	daily
  ecb_deposit	The ECB deposit rate, its policy rate, set at its meetings	daily
  aaa_3m, aaa_6m, aaa_1y	The 3-month, 6-month and 1-year rates on AAA-rated euro area government bonds	daily
  borrowing_companies	What banks charge companies on new loans, euro area, about five weeks after the month	monthly

• There is no Euribor. It belongs to EMMI, which licenses any commercial use. aaa_3m is the nearest: over a year it ran 10 to 15 basis points below 3-month Euribor and moved with it.

• latest is the latest rate held, in per cent, null until there is one. A monthly rate is dated on its month's first day.

• changed_on: the first day of the level the latest rate holds. For ecb_deposit, the day of the last decision that moved it.

• change_bp: basis points (+25 is a quarter of a percentage point), against the rate a week and three months before the latest for a daily rate, a month and a year before for a monthly one; null otherwise, or when that is older than the rates held.

• year: the lowest and highest rate of the last year.

• history: each rate, only when since is sent.

To read a radar's interest rates, see GET /radars/{id}/rates.