Why Oil at $100 Raised US Mortgage Rates in Two Hours

Oil Hit $100 and Your Mortgage Rate Moved Two Hours Later

Crude passed one hundred dollars a barrel yesterday for the first time

since July. Within two hours, the average American thirty-year

mortgage rate had risen to 6.73%, and the five-one adjustable rate had

moved through 7%.

Those two facts are five steps apart. Every step is observable, and

none of them required anyone to act strategically.

This piece walks the chain, and then spends most of its length on the

last link, because that is the one that reaches households and the one

that gets explained least well.

The five steps

Conflict restricts supply. Crude rises. Energy costs enter producer

prices. Producer prices reach consumer prices. Inflation expectations

rise.

Four of those five appear in published data within weeks of each

other. The chain is not hidden. It is spread across enough separate

releases that it is rarely assembled into one picture, and each

release is reported as its own story.

The first link is the one everybody covers. A conflict affecting a

producing region or a shipping route reduces the supply available, or

introduces enough doubt about future supply that buyers pay more to

secure it now. Either produces the same price outcome.

The second and third links move slowly enough to be missed. Energy is

an input to almost everything that is manufactured or moved. Producer

price indices pick that up first, typically weeks before consumer

prices do, which is why PPI is worth watching when energy moves

sharply.

The fourth link is where households notice. Consumer prices rise, and

the rise is broad rather than concentrated, because energy touches

food, transport, packaging and heating simultaneously.

The fifth link is expectations, and it is the one that matters for

what follows.

Why mortgage rates do not track the central bank

This is the part that surprises people, including some who work in

finance.

Mortgage rates are not set by the central bank. They are benchmarked

against the ten-year government bond yield, and in the United States

that means the ten-year Treasury.

The reason is duration. A thirty-year mortgage is not held for thirty

years. Most are refinanced or repaid when the property is sold, and

the average life works out closer to a decade. So the instrument that

prices a mortgage most accurately is the one with a similar horizon.

When inflation expectations rise, buyers of ten-year paper require

more yield to hold it. They are being asked to accept a fixed return

across a decade in which money may be worth less than they assumed

when they bought. The compensation for that is a higher yield.

Mortgage pricing follows within hours, because the benchmark reprices

continuously and lenders adjust against it daily rather than waiting

for a policy meeting.

That is why a household borrowing rate can move on a morning when the

central bank has said nothing at all. The transmission runs through

the bond market, not through announcements.

Where this stands today

The US ten-year sits at 4.867%. The German ten-year Bund is at 3.451%,

its highest level since 2011.

The second number is worth sitting with. German borrowing costs have

not been at this level since before the euro crisis, and the move has

happened without a German-specific cause.

Two research houses have independently flagged 5% on the US ten-year

as the level at which equity markets face genuine pressure. Jefferies

raised it three weeks ago. Bernstein raised the same figure last week,

in the context of Asian equities. Neither cited the other.

Independent agreement on a specific threshold is worth more than

either forecast on its own, because the two arrived there through

different reasoning.

What a transmission mechanism actually is

A conflict thousands of miles from Ohio raised the cost of borrowing

to buy a house there. Nobody in that chain intended the outcome.

That is worth stating plainly, because the word mechanism suggests

design and there is none here. No participant coordinated with

another. The oil trader was not thinking about mortgages. The bond

buyer was not thinking about the conflict. Each acted on the

information in front of them, and the aggregate produced a result none

of them was aiming at.

That is precisely what makes transmission difficult to anticipate. A

strategy can be predicted by understanding the strategist. A chain of

independent decisions cannot, because there is no single actor whose

reasoning you could reconstruct.

What you can do is watch the links. Each one is observable, published,

and slower than the headline suggests. The gap between the first link

and the fifth is measured in weeks, which is a long time to be looking

in the wrong place.

What I am not saying

I have no view on where yields settle, and no forecast on what the

European Central Bank does today or what US inflation data shows

tomorrow.

Most of the commentary on this week's yield moves has attributed them

to inflation and to policy expectations. Both matter. But a bond yield

is also a price, and prices respond to supply as well as to

expectations, which is a separate argument I have made elsewhere.

The point of this piece is narrower. When energy moves sharply, the

household cost of borrowing moves too, and it moves faster than most

people expect because the link runs through a market that reprices

every second rather than through a committee that meets eight times a

year.

A note on what to watch

If you want to follow this chain yourself, the sequence is: crude,

then producer prices, then consumer prices, then the ten-year, then

mortgage pricing.

The economic calendar tells you when each of those is published. We

publish one free, with no signup required, at the link below.

Educational research and market intelligence. Not financial advice.

Nothing here is a recommendation to buy or sell.