DFFInterest RatesDailyEffective Federal Funds Rate
The effective federal funds rate — the volume-weighted median rate at which depository institutions lend reserves to each other overnight.
Update frequency
Daily
Unit
%
Historical coverage
1954-07/..
Why DFF matters
The primary transmission channel of Fed monetary policy. Used to model policy stance, real rates, and financial conditions.
Get the latest value
Fetch the most recent Effective Federal Funds Rate reading with a single GET request. Free tier includes 100 calls per day.
# cURL
curl -H "X-API-Key: brd_your_key" \
https://api.bullrundata.com/api/v1/indicators/DFF
# Python
import requests
r = requests.get(
"https://api.bullrundata.com/api/v1/indicators/DFF",
headers={"X-API-Key": "brd_your_key"},
)
print(r.json())
# JavaScript
const res = await fetch("https://api.bullrundata.com/api/v1/indicators/DFF", {
headers: { "X-API-Key": "brd_your_key" },
});
const data = await res.json();
Full historical time series
Retrieve the complete Effective Federal Funds Rate history with min/max/change statistics. Use the range parameter to control the window (1m, 3m, 6m, 1y, 2y, 5y — Enterprise plan extends further).
curl -H "X-API-Key: brd_your_key" \
"https://api.bullrundata.com/api/v1/indicators/DFF/timeseries?range=5y"
Aliases
You can also address this indicator using these shortcuts — the API resolves them to the canonical series ID transparently:
FED_FUNDSFFR