The probability of a Federal Reserve rate hike next month just flipped from unlikely to coin-toss territory. Following hawkish comments from Fed Chair Kevin Warsh at the Jackson Hole Economic Policy Symposium, markets are now pricing in a 55.5% chance of a rate increase at the September 16 FOMC meeting.
That’s a sharp jump from the 30-38% probability traders were assigning just before Warsh took the podium.
What Warsh actually signaled
Warsh, who became Fed Chair earlier in 2026, used his inaugural Jackson Hole address to strike a notably aggressive tone on inflation. The context matters: July 2026 CPI came in at 3.4%, well above the Fed’s 2% target. That target has now been missed for over 65 consecutive months.
At the most recent FOMC meeting on July 28-29, the committee voted to hold the federal funds rate steady at 3.50%-3.75%. But the decision wasn’t unanimous. Three regional Fed presidents dissented, pushing for an outright rate hike.
Warsh has also shown a clear preference for less detailed forward guidance, opting instead to discuss broader structural questions about the economy. Bond markets have already felt the difference, with yields swinging more aggressively around Fed events than they did under the prior regime.
Why inflation won’t cooperate
At 3.4%, the July reading isn’t catastrophic by historical standards, but it’s persistent after 65-plus months of overshooting the Fed’s 2% target.
Beth Hammack, among others, has publicly indicated that tighter monetary policy may be necessary to bring inflation back in line.
The current rate range of 3.50%-3.75%, set against inflation running at 3.4%, means real interest rates are barely positive. A 25 basis point hike to 3.75%-4.00% would nudge real rates slightly higher.
What the market reaction tells us
The jump from roughly 35% to 55.5% probability in a single session means the market went from viewing a September hike as a minority scenario to treating it as the base case.
The September 15-16 FOMC meeting is now the most consequential policy event on the calendar. With more than half the market already betting yes on a hike, the burden of proof may have quietly shifted to those arguing for a hold.