What it means
Because it is a policy rate rather than a market price set by supply and demand alone, the federal funds rate is best understood as a signal. When the committee moves the range, it is telling banks, businesses and households how expensive short-term money is meant to be for the coming weeks.
The announcement takes the form of a range, such as 4.25% to 4.50%, and commentators usually quote the midpoint, in that case 4.375%. The range exists because the Fed steers the market rather than dictating each trade, and a band gives it room to operate.
Transmission into the wider economy is mostly indirect but quick at the short end. Banks reset the prime rate, historically about three percentage points above the top of the target range, and floating-rate business loans, overdrafts and card rates follow within a billing cycle or two.
Longer-dated borrowing responds differently and sometimes in the opposite direction. If the committee raises rates and investors conclude that inflation will therefore be lower in five years, long-term yields can fall even as short-term rates rise, which is how an inverted yield curve forms.
For planning purposes the level matters less than the direction and the pace. A business with floating-rate debt should model a rising path, a flat path and a falling path, and check that it can still meet its covenants in the least convenient of the three.
In practice
Real-world examples.
Example
A restaurant group with $4 million of borrowings on a prime-linked facility sees its interest bill move by $40,000 for every one percentage point change in the policy range. The owner builds that sensitivity into every new site appraisal.
Example
A pension scheme trustee reviews the discount rate used to value liabilities after a run of policy increases. Higher rates reduce the present value of future payments, improving the reported funding position without any change to the promises made.
Example
A mortgage broker explains to a client that a policy cut will lower the rate on her variable home equity line almost immediately, but may do little to the thirty-year fixed rate she is being quoted.
Think of it
“Fed funds rate is the basic US interest rate-what banks charge each other overnight.
Formula
Calculation
Target range midpoint = (lower bound + upper bound) / 2. Prime rate, by convention, = upper bound of the target range + 3.00%. Annual interest on a floating loan = principal x (prime rate + margin).
Suppose the target range is 4.25% to 4.50%, giving a midpoint of (4.25% + 4.50%) / 2 = 4.375% and a prime rate of 4.50% + 3.00% = 7.50%. Fenwick Joinery borrows $2,000,000 on a facility priced at prime plus 1.00%, so its rate is 8.50% and its annual interest is $2,000,000 x 8.50% = $170,000. If the committee cuts the range by 50 basis points, prime falls to 7.00%, the loan rate becomes 8.00%, and annual interest falls to $2,000,000 x 8.00% = $160,000, a saving of $10,000 a year.Case study
Seen in the real world.
This is a fictional case used for illustration. Marlowe Garden Centres, an invented chain of eight sites, had a $6,000,000 term loan on a prime-linked rate and a banking covenant requiring interest cover of at least three times operating profit. At a prime rate of 7.50% plus a 1.50% margin, interest was $540,000 against operating profit of $2,100,000, giving cover of about 3.9 times.
The finance director stress-tested a two percentage point rise in the policy range. That would take the loan rate to 11.00%, interest to $660,000 and cover to roughly 3.2 times, still inside the covenant but uncomfortably close if trading softened at the same time.
On the strength of that single calculation, the board fixed $3,000,000 of the balance with an interest rate swap and negotiated a temporary covenant holiday tied to policy rate moves. The illustrative lesson is that the policy rate belongs in covenant modelling, not only in the interest line of the budget.
Watch out
Common mistakes.
- Believing the federal funds rate is the rate consumers or businesses actually borrow at. It is a rate between banks, and everything else is priced at a margin above it.
- Assuming a single announced number rather than a range. Since the range was adopted, the committee announces a lower and an upper bound, and analysts quote the midpoint for convenience.
- Expecting long-term fixed rates to move point for point with policy changes. Long rates depend on expected inflation and growth over many years and often move by much less, or the other way.
Questions
People also ask.
How is the federal funds rate different from the discount rate?
The discount rate is what the Fed itself charges banks that borrow directly from it, and it is normally set a little above the top of the target range.
What is a basis point in this context?
One basis point is 0.01%, so a "25 basis point cut" lowers the target range by a quarter of a percentage point.
Does a change take effect immediately?
The new range applies from the day after the decision, and market rates adjust within a day, while loan and deposit repricing follows over the following weeks.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%