New York, United States (AFP) — US inflation data released Tuesday slowed slightly in October but still overshot analyst estimates, raising expectations for another Federal Reserve interest rate hike.

The consumer price index for October rose 0.4 per cent from September, down from the prior month’s 0.6 per cent increase, according to Labor Department data. Analysts had projected a 0.3 per cent increase.

The improvement from the prior month reflected a significant moderation in energy price increases from the September period. The prior CPI report had shown the effects of a big jump in fuel prices following renewed clashes in the US-Iran war over the summer.

But food prices shot higher in October, along with medical care, household furnishings and several other categories.

The report follows last week’s US midterm elections in which voters turned sharply against President Donald Trump’s Republican Party in part due to persistent inflation.

Inflation that strips out volatile food and energy components rose 0.3 per cent instead of the 0.2 per cent forecast by analysts.

The report “sets the stage for a December Fed hike,” read the headline on a note from Oxford Economics.

“Though energy prices moderated as expected, it was food inflation that drove the forecast miss of last month’s headline CPI,” Oxford Economics said in the note.

“Grocery-store inflation accelerated notably after a string of quiescent readings, underscoring the lags between energy price shocks and nonenergy consumer prices.”

Price hikes for energy slowed significantly compared with the prior report, with the gasoline index rising one per cent — far below the 9.1 per cent spike in September from August.

The index for food rose 0.5 per cent in October after being unchanged in September.

Joseph Brusuelas, chief economist at RSM, said the inflation report could keep a “supersize hike on the table at the December Fed meeting,” alluding to comments earlier Tuesday from Fed Governor Christopher Waller.

“In my estimation this requires rate hikes by the Fed and we think that a December rate hike is baked in the cake given that this is the final CPI report that the Fed will get to observe,” Brusuelas said.

Futures markets now see a December rate hike as essentially guaranteed, with 85 per cent of trader bets expecting a one-quarter percentage point hike and 15 predicting a half-percentage point increase.

Earlier Tuesday, Waller signaled support for a December rate increase due to persistently elevated inflation, saying the central bank must act “sooner rather than later, to return inflation to a path that will reach two percent in the medium term.”

Waller cited inflationary effects from the artificial intelligence buildout and pointed to Fed research that suggests “energy price pressures may pass through to goods and services in a more sustained way than in the past.”

Speaking a few hours before the CPI release, Waller said he was “leaning towards” a 25 basis point rate in December even with an October report showing moderation in pricing pressures.

But if October pricing dynamics are similar to last month’s, “then a stronger policy move may be needed,” he said.

“In that case, I believe a 50 basis point hike in the policy rate should be considered at the December meeting,” Waller added. “Hiking only 25 basis points would put our credibility at risk, a risk I am not eager to take.”