September CPI finally delivered the inflation surprise markets had been dreading.

Headline prices rose 0.6% for the month and 3.7% from a year ago, while core CPI increased 0.3% and 2.6% annually. Both core readings were slightly hotter than expected, and gasoline surged more than 9% during the month. Reuters

Wall Street reacted quickly.

The Nasdaq fell 1.9%, the S&P 500 lost 1.1%, and the semiconductor index dropped more than 4%. Gold fell almost 2%, silver plunged more than 6%, and Bitcoin slid below $82,000. The dollar jumped to an 18-month high. Reuters

The message seemed straightforward.

Inflation is getting worse.

The Fed will have to fight it.

There is just one problem.

So far, the Fed has barely fought anything.

Twenty-Five Basis Points

Kevin Warsh has raised rates exactly once this year.

By 25 basis points.

That is the sum total of the Fed's actual tightening since inflation began turning higher again.

Everything else has largely been rhetoric.

Fed officials have spent weeks warning that inflation is too high, that the 2% target remains important and that additional tightening may eventually be necessary.

Fine.

But inflation does not respond to speeches.

Oil does not fall because a Fed governor sounds concerned.

Consumers do not pay less for gasoline because the FOMC minutes use the phrase "price stability."

And Wednesday's CPI report showed the problem moving in the wrong direction.

Headline inflation increased from 3.4% to 3.7%.

Core inflation also surprised on the upside.

Gasoline was the biggest contributor, but shelter, airfares and other categories showed that the pressure was not confined entirely to the pump. Chicago Fed President Austan Goolsbee called the report "discouraging," particularly because some of the services inflation cannot simply be blamed on oil. Reuters

That is considerably harder to dismiss as temporary.

The Market Assumes the Fed Will Act

Immediately after CPI, the probability of an October hike jumped from roughly 20% into the 35%-45% range.

December became even more heavily priced for another increase. Investing.com

That helped crush many of the assets that had benefited from expectations of easier policy.

Technology took the biggest hit.

This makes sense mathematically. The more valuable a company's expected profits are years into the future, the more sensitive its valuation becomes to the discount rate applied to those profits.

The AI trade has another problem now.

Much of the next phase of the boom requires tremendous amounts of borrowed money.

CoreWeave has roughly $48 billion in bonds and loans, and yields on some of its debt have climbed toward 15%. Oracle, Meta and other companies are also raising enormous amounts of capital for data centers and infrastructure. Reuters

When money was almost free, investors could be patient.

At today's rates, patience comes with an interest bill.

That helps explain why Wednesday's inflation report produced such a violent reaction in technology.

The market isn't only worrying that Warsh hikes another quarter point.

It is beginning to wonder how much all this growth will cost to finance.

Gold Had the Same Problem

Gold's reaction was almost textbook.

Inflation rises.

Fed-hike expectations rise.

The dollar strengthens.

Gold falls.

Spot gold dropped about 1.8% to $4,084, while silver fell 6.6% to roughly $55.50. Reuters

That may initially seem strange.

Isn't gold supposed to protect against inflation?

Yes.

But gold also competes against interest-bearing assets.

If investors believe the Fed will respond aggressively enough to raise real yields, a Treasury paying more than 5% becomes serious competition for metal that pays nothing.

The Wednesday selloff therefore reflected faith—at least temporarily—that the Fed intends to regain control.

Which returns us to the same question.

Why?

Warsh raised rates once.

He has not demonstrated a willingness to conduct the kind of persistent tightening campaign markets are suddenly pricing into gold, silver and high-growth stocks.

Perhaps he will.

But markets appear to be giving the Fed credit before it has earned it.

Then Bonds Did Something Interesting

Treasury yields initially reacted exactly as expected.

The 10-year shot back toward 5.3% after the CPI release.

Then the move reversed.

By overnight trading, the 10-year had fallen toward 5.09% and the 30-year to about 5.45%, their lowest levels in roughly three weeks. Reuters

Part of that was simple risk aversion.

Money leaving stocks moved into government bonds.

Fed officials also immediately began pouring water on expectations for an October hike.

San Francisco Fed President Mary Daly said additional rate increases would probably be necessary but emphasized there was no urgency to move later this month. Reuters

That is almost a perfect illustration of the Fed's current posture.

Inflation surprises higher.

Markets panic about another hike.

Fed officials quickly explain that everyone should remain calm.

WUCO lives.

By early Thursday, the market was again pricing a much greater probability that the Fed waits in October.

So Wednesday managed to produce a bizarre sequence:

Hot inflation.

Higher hike odds.

Technology collapse.

Metals collapse.

Treasury yields initially surge.

Then Fed officials talk.

Treasuries rally.

October hike odds retreat.

One day.

Two completely different monetary-policy narratives.

PPI Gets the Next Vote

Thursday morning brings the Producer Price Index.

That report could either confirm Wednesday's warning or muddy the picture again.

Expectations are for roughly a 0.6% monthly increase in producer prices, up from 0.4% in August. MarketWatch

PPI may actually be especially important this month because diesel and freight costs tend to appear earlier in producer prices than they do in final consumer prices.

Diesel prices have been extraordinarily high for weeks.

Truckers pay those prices immediately.

Retail customers feel them later.

If PPI also comes in hot, the argument that September CPI was mostly a temporary gasoline story becomes more difficult.

Businesses paying more for transportation, materials and intermediate goods eventually have three choices.

Raise prices.

Accept lower margins.

Cut costs elsewhere.

Usually they do some combination of all three.

That is how an energy shock spreads.

The Fed Can Still Wait

Even another hot PPI report may not force an October hike.

That needs to be emphasized.

The September employment report was weak.

The meeting comes just days before the midterm elections.

Several Fed officials have clearly signaled a preference for moving gradually.

Markets understand this.

After the initial CPI reaction, the probability of an October increase was already retreating again.

December remains the much more likely meeting.

That is probably where the real risk lies.

If Warsh pauses this month and both CPI and PPI continue worsening, he arrives in December with considerably less room to maneuver.

Then 25 basis points may look cosmetic.

Especially if October CPI rises again.

The Fed keeps trying to move slowly enough not to damage employment.

Inflation is under no obligation to move slowly with it.

The Jawboning Problem

There is nothing wrong with communication.

Central banks have always used expectations as part of monetary policy.

If businesses and investors believe the Fed will act decisively, that expectation itself can tighten financial conditions.

Stocks fall.

The dollar rises.

Borrowing becomes more expensive.

Speculation cools.

In that sense, jawboning can accomplish something.

But there is a limit.

Eventually markets notice whether the threatened action actually occurs.

Warsh has talked tough for months.

September finally produced one hike because markets had essentially forced the issue.

Now officials are again telling investors that more tightening may be needed while simultaneously arguing there is no urgency to do it.

That can work if inflation begins improving on its own.

It becomes considerably less convincing if inflation keeps rising.

At some point credibility requires more than language.

Thursday Can Simplify Things—or Make Them Worse

A soft PPI number would give Warsh exactly what he wants.

CPI was hot because of gasoline.

Producer pressures are easing.

Employment has weakened.

Wait until December.

Markets would probably welcome that interpretation.

Technology could rebound.

Metals could stabilize.

Treasury yields could continue their overdue retreat.

A hot PPI report creates the opposite problem.

Then consumer inflation and producer inflation are both pointing higher while energy remains elevated.

The Fed would have to explain why a 3.7% CPI rate, accelerating producer costs and oil near $100 still do not require immediate action.

Perhaps there is a good answer.

But the burden of proof starts shifting.

For months the Fed has asked markets to believe it is serious about returning inflation to 2%.

Wednesday reminded everyone that inflation is moving away from that goal.

So far Warsh's inflation fight consists of one 25-basis-point hike and an impressive collection of warnings.

Thursday's PPI may tell us whether the warnings are working.

Or whether inflation stopped listening.