Fed Rate Hike Odds Hit 81% After CPI | Kalshi Promo Code

Fed rate hike odds have jumped to 81% on Kalshi after Friday's August inflation report pushed traders toward a quarter-point increase at the Federal Reserve's September meeting.

Kalshi's live September Fed decision market was pricing a 25-basis-point hike at 81% as of a 5:06 p.m. ET Friday check.

A decision to leave rates unchanged was down to 20%.

More than $58.5 million has already traded in the market.

The move followed an August Consumer Price Index report showing headline inflation rising 0.4% from July and 3.4% from a year earlier. Core CPI, which excludes food and energy, increased 0.3% for the month and 2.4% year over year.

That core monthly reading came in hotter than economists expected and strengthened the argument for the Fed to resume raising rates at its September 15-16 meeting.

See the live September Fed decision market on Kalshi.

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Fed Rate Hike Odds Jump to 81% on Kalshi

The September Fed market changed dramatically after Friday morning's CPI release.

Kalshi currently shows:

• 25 bp Fed hike: 81%
• Fed holds rates steady: 20%
• Hike greater than 25 bp: about 2%
• Market volume: more than $58.5 million

The 25-basis-point contract was up roughly 18 percentage points on Kalshi's current board.

That is a major move for a Federal Reserve decision only days away.

The market had spent much of the past several weeks debating whether the Fed would act at all in September.

Friday's inflation report shifted that discussion.

The question is increasingly becoming whether policymakers can justify not raising rates after another firm inflation reading.

August CPI Pushes Fed Rate Hike Odds Higher

The headline Consumer Price Index increased 0.4% in August.

Compared with August 2025, consumer prices were up 3.4%.

The more important number for Friday's Fed reaction was core CPI.

Core prices increased:

• 0.3% month over month
• 2.4% year over year

Economists had generally expected a 0.2% monthly increase in core CPI.

The 0.3% result therefore gave markets another reason to question whether inflation is cooling quickly enough for the Fed to remain on hold.

That distinction matters.

The headline 0.4% increase was not wildly outside expectations.

The bigger issue was the underlying inflation reading.

Core inflation came in hotter than expected just days before policymakers gather in Washington.

Rate Markets Now Strongly Favor a September Hike

Kalshi is not alone.

Traditional interest-rate markets have also moved heavily toward a September increase.

Rate futures were pricing roughly an 85% chance of a quarter-point hike after the CPI report, up from around 70% before the release.

That puts Kalshi and conventional rate markets in broadly similar territory.

Kalshi traders: roughly 81%.

Rate futures: roughly 85%.

Neither market guarantees what the Federal Reserve will do.

Both show that traders now see a September hike as the substantially more likely outcome.

Why the Fed Could Raise Rates in September

The Federal Reserve has kept its target range at 3.50% to 3.75% throughout 2026.

That pause has depended heavily on the idea that inflation would continue moving toward the Fed's 2% objective without additional tightening.

Recent data have made that assumption harder to defend.

August CPI followed another firm inflation signal from producer prices.

Energy costs have also climbed sharply.

Oil prices have traded above $100 per barrel amid renewed geopolitical tension, increasing concern that energy inflation could work its way through transportation, production and consumer prices.

That is an uncomfortable combination for policymakers.

The Fed does not want to tighten unnecessarily.

It also does not want to allow another inflation cycle to become entrenched.

Friday's CPI report pushed traders toward the second risk.

Kevin Warsh Put Inflation Back at the Center of the Fed Debate

Federal Reserve Chair Kevin Warsh had already warned that policymakers may need to act if they lose confidence that underlying inflation is moving toward 2% at a sufficient pace.

That made Friday's CPI report particularly important.

The Fed could have interpreted another soft inflation print as evidence that patience was working.

Instead, core CPI rose 0.3%.

That increases the pressure on Warsh and other officials who have stressed the need to demonstrate credibility on inflation.

The July Federal Reserve meeting had already revealed growing disagreement.

The Fed voted 9-3 to maintain its policy rate, meaning three policymakers favored a different course.

September now arrives with inflation still above target and market expectations heavily tilted toward a hike.

What Does an 81% Kalshi Probability Mean?

Kalshi is a prediction market rather than a traditional sportsbook.

Users trade event contracts tied to specific outcomes.

In the September Fed market, a contract on a 25-basis-point rate hike trading around 81 cents corresponds roughly to an 81% market-implied probability.

If the specified outcome occurs according to the market rules, a winning contract settles at $1.

If it does not occur, it settles at $0.

Prices move as traders buy and sell.

That means the 81% figure can change quickly.

It is not an official Federal Reserve forecast.

It is not a guarantee.

It is a live reflection of what traders are collectively willing to pay for the quarter-point-hike outcome.

Fed Rate Hike Odds Have Moved Fast in September

The September Fed market has changed repeatedly over the past several weeks.

At the end of August, Kalshi traders had a quarter-point hike below 50%.

The market moved higher after stronger economic data.

Following the latest jobs report, the 25-basis-point hike probability reached 53%.

Friday's CPI release then created another major repricing.

The contract is now around 81%.

That progression illustrates how sensitive Fed markets are to incoming economic information.

You can see the earlier stage of the move in our Fed rate hike odds breakdown after the jobs report.

The jobs report made a hike slightly more likely than a hold.

CPI has now produced a much wider gap.

Fed Hold Odds Fall to 20%

The other side of the September decision has moved just as dramatically.

Kalshi now gives the Fed roughly a 20% chance of maintaining its current target range.

A hold was previously competitive with a hike.

It is now the clear underdog outcome.

There is still an economic case for patience.

The Fed's preferred inflation gauge is the Personal Consumption Expenditures Price Index, not CPI.

Some economists believe the August PCE components may look softer than Friday's CPI headline suggests.

There is also a risk that policymakers view recent inflation pressure as temporary, particularly if energy costs eventually retreat.

That explains why the hold probability has not fallen to zero.

But traders are clearly demanding a much larger price to bet against a September hike.

Could the Fed Hike More Than 25 Basis Points?

Kalshi traders are showing very little interest in a larger increase.

A hike of more than 25 basis points is sitting at only about 2%.

That tells us the market is not expecting an emergency tightening move.

The dominant scenario is a conventional quarter-point increase.

The current debate is therefore concentrated around two outcomes:

• A 25-basis-point hike
• No change

The market currently gives the first outcome an overwhelming advantage.

September Fed Meeting Is Set for September 15-16

The Federal Open Market Committee meets next week.

The two-day meeting runs September 15-16, with the policy decision due Wednesday.

That leaves very little time for the current market narrative to change.

The major August CPI report is now in the books.

The Fed will enter the meeting with inflation above its 2% objective, core CPI firmer than expected and markets strongly expecting policymakers to tighten.

That does not make a hike automatic.

It does make an unchanged-rate decision increasingly difficult for markets to price as the base case.

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Fed Rate Hike Odds: What to Watch Next

Fed rate hike odds now strongly favor a quarter-point increase.

Kalshi has the September hike around 81%.

Traditional rate futures are even higher, around the mid-80% range.

The Fed hold contract has fallen to approximately 20%.

The shift is directly tied to an inflation picture that remains uncomfortable for policymakers.

Headline CPI rose 0.4% in August.

Core CPI rose 0.3%.

Annual headline inflation remains 3.4%, well above the Federal Reserve's long-run 2% objective.

The market's message entering the September meeting is therefore much clearer than it was a week ago.

Traders expect the Fed to raise rates.

The remaining question is whether policymakers follow the market or deliver another hold despite inflation refusing to cool as quickly as hoped.

Current Kalshi September Fed odds: 25-basis-point hike 81%, hold 20%.

Prediction-market prices can change rapidly before the Federal Reserve announces its decision.