Not so fast on rate hikes, some Fed officials say

After Federal Reserve chairman Kevin Warsh's speech in Jackson Hole , the markets penciled in an interest rate hike for the central bank's mid-September meeting.

Comments from two influential officials now throw those expectations into question.

The big picture: With August jobs and inflation data due out before a policy meeting in two weeks, the decision of whether to tighten policy appears to be on a knife-edge.

A meaningful contingent of Fed leadership is eager to raise interest rates to address stubbornly high inflation, while another, as Fed governor Christopher Waller put it Thursday morning, channeling John Lennon , is willing to "give disinflation a chance." It's a close enough call that Warsh will likely be able to steer a decision whichever way he prefers.

Driving the news: At a Reuters newsmaker event Thursday, Waller noted two consecutive months of improving inflation data.

If it continues in August reports over the coming days, he said, "I would be inclined to support" holding rates steady.

But if the incoming data shows "improvement has been fleeting," he is open to a rate hike, Waller added.

On Wednesday, New York Fed president John Williams told CNBC that "I think we have to wait and see" whether an interest rate increase is needed.

"There's no clear signs right now whether monetary policy is currently sufficient to make sure we bring inflation back to target in the next year or two, or whether you need to see further action to do that." State of play: Their comments come after Warsh said that the Fed "must be confident that underlying inflation is moving to our objective, clearly and at sufficient speed," or else they "have work to do." That leaves room for a judgment call on whether that bar has been reached.

Warsh has resisted hanging policy decisions on the fine details of each incoming data release, as Waller seems inclined to do.

CME's FedWatch tool now puts the odds of a rate hike at the meeting concluding Sept.

16 as essentially a coin flip, whereas on Wednesday, the futures market-based odds favored an increase.

Zoom in: The New York Fed president is vice chair of the policy-setting Federal Open Market Committee and has traditionally acted as part of a leadership troika, with the chairman and vice chair of the Board of Governors.

Traditionally, governors like Waller are reluctant to dissent from policy decisions, though that norm has dissolved in the last couple of years.