What a Central Bank Actually Sets, and What It Only Influences
Key takeaway
- The policy rate is the rate banks charge each other to lend overnight. You cannot get it, and almost nothing you own is priced off it directly.
- Long-term rates are their own market. A cut at the short end does not drag mortgages or the 10-year with it — Greenspan called that gap the conundrum.
- And the decision itself is usually priced before it happens, which is why markets often move on the wording rather than on the number.
Learning pathWhy did it move? Earnings, rates and the newsStep 4 of 9
Read before this:Second-Level Thinking: Why a Good Company Is Not a Good Buy
Based on a clip by First Citizens Bank (@firstcitizensbank) — YouTube
What the rate actually is
It is an overnight rate between banks — the price of lending spare reserves until tomorrow morning.
The video's definition is the whole thing: “It really is just the rate banks charge to lend excess reserves to each other overnight. The important part there is overnight.” Eight scheduled meetings a year set it, each with a statement and a press conference, and four of those add a set of projections.
The curve: one rate at each maturity
There is no single interest rate. There is a rate for every length of loan, and the policy rate is only the shortest one.
It normally slopes upward for a simple reason the video gives plainly: “Investors should demand more yield to lend for a longer period of time.” Lending for thirty years carries more of everything that can go wrong than lending overnight. When the curve inverts — short rates above long ones — that is treated as a distortion and often read as a recession signal, though the video is careful to note the last such episode did not deliver one on schedule.
Why a cut may not reach the thing you care about
The short end is set. The long end is voted on daily by everyone who buys and sells bonds.
The video's central caution: “Mortgage rates, longer-term rates, they're their own market. Do they rhyme sometimes with the Fed? Yes. But they do operate independently.” It attributes the observation to Alan Greenspan, who called it the great conundrum — the central bank controls the overnight rate and not longer-term ones.
That long end is where a mortgage is priced, and it is also the rate a company's distant profits get discounted at, which is why it matters to a stock at all. If you want to know what the market thinks about growth and inflation, read the long end, not the announcement — and what a bond actually is explains why its price and its yield move in opposite directions when you do.
The decision is usually old news by the time it is announced
Meetings are scheduled years ahead and the outcome is forecast constantly, so the number itself is rarely the surprise.
As the video notes in passing, a move is often “already priced before the Fed even makes the decision.” What can still surprise is the wording — the projections, the press conference, any hint about the path from here. This is the same mechanism as a stock falling on good news: the event is measured against the expectation, and the expectation is already in the price.
What a beginner should do about rate news
Understand the mechanism, then stop trading on it.
Not worth your time
- Predicting the next decision
- Buying before a meeting because a cut is “obvious”
- Assuming a cut lifts every asset you own
Worth knowing
- Which of your holdings is priced off long rates
- That savings rates follow the policy rate closely
- That a cut and a rising mortgage rate are not a contradiction
This is one of the most heavily forecast numbers in the world, watched full-time by people who do nothing else. That is precisely the condition under which an individual has no edge — the argument in why most active investors trail the index, applied to macro instead of to stock picking.
Try this week
- Look up your country's current policy rate and its 10-year government bond yield, and note the gap.
- Find the date of the next scheduled rate decision.
- Check what the 10-year did on the day of the last decision — it may not have moved the way the headline suggests.
- Write down which of your holdings, if any, is actually priced off a long-term rate.
Common questions
What is the federal funds rate in simple terms?
The interest rate banks charge each other to lend reserves overnight. It is set by committee at eight scheduled meetings a year, it applies to a one-night loan between banks, and no ordinary person can borrow or lend at it directly.
Does a rate cut lower my mortgage rate?
Not reliably. Mortgages are priced off longer-term rates, which trade in their own market and are driven by expectations for growth and inflation. They sometimes move with the policy rate and sometimes move against it on the same day.
What is the yield curve?
A plot of the yield on government debt at every maturity, from overnight out to thirty years. It normally slopes upward because lenders want more return for tying money up longer. When short rates sit above long ones the curve is inverted, which is widely read as a recession signal.
Why do stocks sometimes fall when rates are cut?
Two reasons. The cut may already have been expected and therefore already in prices, so only a surprise in the accompanying language moves anything. And a cut can be read as evidence the economy is weakening, which is bad for the profits a stock price is built on.
Should I change my investments around a rate decision?
Almost certainly not. The decision is among the most forecast events in finance, followed full-time by professionals, which means an individual acting on the headline is trading against people who priced it weeks ago. Understanding the mechanism is useful; timing it is not.