Symbols / FED_IORB

FED_IORB

Interest on Reserve Balances

Interest rate paid by the Fed on reserve balances. Key tool for setting a floor on short-term rates since 2021.

Central Bank Active

Country

USD

Frequency

daily

Update cadence

What is Interest on Reserve Balances (FED_IORB)?

Interest on Reserve Balances is a central bank policy rate — the interest rate at which a country's central bank lends money to commercial banks. It is the primary tool used by monetary authorities to control inflation, stabilize the currency, and influence overall economic activity.

Central bank rates serve as the floor for all borrowing costs in an economy. They directly influence mortgage rates, consumer loans, corporate bonds, and the exchange rate. Investors, economists, and financial institutions closely monitor these rates as leading indicators of monetary policy direction.

Decided by a monetary policy committee
Changed a few times per year at scheduled meetings
Key input for discounted cash flow models
Influences currency valuations in FX markets

Uses and Related Industries

Primary Industries

Retail & Mortgage Banking: Variable-rate mortgage and consumer loan pricing directly tracks the policy rate.

Corporate Finance: Discount rate assumption in DCF models and cost-of-capital calculations.

Insurance & Actuarial: Liability discounting and reserve calculations for life insurance products.

Sovereign Wealth & Pension Funds: Strategic asset allocation and fixed-income duration management.

FX & Macro Trading: Carry trade structuring and currency pair valuation relative to rate differentials.

Specific Applications

Repricing floating-rate credit facilities and syndicated loans
Monetary policy analysis and central bank decision forecasting
Asset-liability management (ALM) for commercial banks
Yield curve construction and interest rate scenario modeling
Real-time alerts for rate decisions and policy statement changes

API Usage Examples for FED_IORB

Click each endpoint to see the request URL, parameters, and a sample response.

API Request

https://interestratesapi.com/api/v1/latest?api_key=YOUR_API_KEY&symbols=FED_IORB

Request Parameters

Parameter	Required	Description
api_key	required	Your API key.
symbols	required	Comma-separated symbol codes. E.g. FED_IORB

Sample Response

{
    "success": true,
    "date": "2026-05-26",
    "rates": {
        "FED_IORB": 4.25
    },
    "dates": {
        "FED_IORB": "2026-05-26"
    }
}

API Request

https://interestratesapi.com/api/v1/historical?api_key=YOUR_API_KEY&symbols=FED_IORB&date=2026-05-26

Request Parameters

Parameter	Required	Description
api_key	required	Your API key.
symbols	required	Symbol code(s). E.g. FED_IORB
date	required	Date in YYYY-MM-DD format.

Sample Response

{
    "success": true,
    "historical": true,
    "date": "2026-05-26",
    "rates": {
        "FED_IORB": 4.25
    }
}

API Request

https://interestratesapi.com/api/v1/timeseries?api_key=YOUR_API_KEY&symbols=FED_IORB&start_date=2026-05-03&end_date=2026-06-02

Request Parameters

Parameter	Required	Description
api_key	required	Your API key.
symbols	required	Symbol code(s). E.g. FED_IORB
start_date	required	Start date (YYYY-MM-DD).
end_date	required	End date (YYYY-MM-DD).

Sample Response

{
    "success": true,
    "symbols": [
        "FED_IORB"
    ],
    "rates": {
        "2026-05-03": {
            "FED_IORB": 4.25
        },
        "2026-06-02": {
            "FED_IORB": 4.25
        }
    }
}

API Request

https://interestratesapi.com/api/v1/fluctuation?api_key=YOUR_API_KEY&symbols=FED_IORB&start_date=2026-05-03&end_date=2026-06-02

Request Parameters

Parameter	Required	Description
api_key	required	Your API key.
symbols	required	Symbol code(s). E.g. FED_IORB
start_date	required	Start date (YYYY-MM-DD).
end_date	required	End date (YYYY-MM-DD).

Sample Response

{
    "success": true,
    "fluctuation": {
        "FED_IORB": {
            "start_rate": 4.25,
            "end_rate": 4.37,
            "change": 0.12,
            "change_pct": 2.8235
        }
    }
}

API Request

https://interestratesapi.com/api/v1/ohlc?api_key=YOUR_API_KEY&symbols=FED_IORB&start=2026-05-03&end=2026-06-02&period=monthly

Request Parameters

Parameter	Required	Description
api_key	required	Your API key.
symbols	required	Symbol code. E.g. FED_IORB
start	required	Start date (YYYY-MM-DD).
end	optional	End date (YYYY-MM-DD). Defaults to today.
period	optional	Grouping: monthly (default), weekly, quarterly.

Sample Response

{
    "success": true,
    "symbol": "FED_IORB",
    "period": "monthly",
    "ohlc": [
        {
            "period": "2026-05",
            "open": 4.25,
            "high": 4.5,
            "low": 4.15,
            "close": 4.37,
            "data_points": 21
        }
    ]
}

API Request

https://interestratesapi.com/api/v1/convert?api_key=YOUR_API_KEY&from=FED_IORB&to=FED_FUNDS&amount=1

Request Parameters

Parameter	Required	Description
api_key	required	Your API key.
from	required	Source symbol. E.g. FED_IORB
to	required	Target symbol. E.g. FED_FUNDS
amount	required	Amount to convert.
term_months	optional	Term in months for interest calculation (default 12).

Sample Response

{
    "success": true,
    "from": "FED_IORB",
    "to": "FED_FUNDS",
    "amount": 1,
    "result": 0.981524
}

Replace YOUR_API_KEY with your key Get a free API key →

Factors Influencing FED_IORB

Market Factors

Inflation rate vs. central bank target (typically 2%)
Employment data: unemployment rate, payrolls, wage growth
GDP growth and output gap vs. potential
Consumer and business confidence surveys

Technical Factors

Taylor Rule model implied rate path
Market-priced expectations via overnight index swap (OIS) curves
Dot plot projections from committee members
Forward guidance language in policy statements

External Factors

Geopolitical risks and energy price shocks
Global financial stability and contagion risk
Trading partner central bank policy divergence
Currency depreciation and imported inflation

Other rates from US

FED_FUNDS

Federal Funds Effective Rate

FED_FUNDS_DAILY

Federal Funds Effective Rate (Daily)

SOFR

Secured Overnight Financing Rate

US_TREASURY_1M

US Treasury Yield 1-Month

US_TREASURY_3M

US Treasury Yield 3-Month

US_TREASURY_6M

US Treasury Yield 6-Month

Other Central Bank rates

BOE_BANK_RATE

Bank of England Official Bank Rate

BOJ_POLICY_RATE

Bank of Japan Policy Rate

ECB_MLF

ECB Marginal Lending Facility Rate

ECB_MRO

ECB Main Refinancing Operations Rate

ECB_DEPOSIT

ECB Deposit Facility Rate

RBA_CASH_RATE

RBA Cash Rate Target

Symbol Details

Symbol: FED_IORB
Category: Central Bank
Country: US
Currency: USD
Provider: fred
Frequency: daily
Series ID: IORB
Unit: percent

Access FED_IORB via REST API

Get live and historical Interest on Reserve Balances data in JSON format. One API, 50+ countries, normalized.

Get Free API Key View API Docs

GET /api/latest?symbols=FED_IORB

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