Federal COF Index Data
The Federal Cost of Funds Index (COFI) is used as a benchmark for
some types of mortgage loans and securities. It is calculated as
the sum of the monthly average interest rates for marketable Treasury
bills and for marketable Treasury notes, divided by two, and rounded
to three decimal places.
The Federal COFI is made available by Freddie Mac on or about the
20th day of each month. Freddie Mac first began publicly providing
the Federal COFI in March, 1991; values are calculated for earlier
years to illustrate what the index values would have been for those
periods and are provided for research purposes only. The Federal
COFI is not adjusted to reflect subsequent changes in the
underlying Treasury rates once the value has been posted.
Historical COF Index Data
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