Fed Cuts Are Off the Table as Hot CPI Puts a December Hike in Play
Core CPI ran 0.3% in October. Officials are debating 25 versus 50 basis points, and options desks are pricing the gap.
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Core CPI ran 0.3% in October, cuts are off the table, and a December hike is priced at 100%. Here is how vol desks read the setup.
The cut narrative is gone
The Fed started the year expecting to ease. It heads into the Dec. 8-9 meeting arguing about how hard to tighten.
October CPI rose 0.4% on the month, with core near 0.3%. Economists had expected core to cool to 0.2%. Fed Governor Christopher Waller had said hours before the release that he would back a 25 basis point hike unless core hit 0.3% or more. After the print, he said a 50 basis point move should be considered, and he argued that a smaller hike risked the Fed's credibility because inflation looked too high and was broadening.
Inflation has now run above the 2% target for more than five years. The committee is no longer debating whether to cut. It is debating the size of the next hike.
What the committee is saying
The split is about pace, not direction. Dallas Fed President Lorie Logan has backed two more 25 basis point moves. Philadelphia Fed President Anna Paulson favors a gradual path. Chicago Fed President Austan Goolsbee called the October report "borderline disturbing" but declined to commit to a December move.
Kansas City Fed President Jeffrey Schmid polled a conference room on whether to cut, hold or hike in December. Nobody picked a cut, and a large majority picked a hike. A room of attendees is not a vote, but it shows where the center of gravity sits.
CME FedWatch has a December hike at 100%, with about 15% odds on 50 basis points. When the base case is fully priced, the 25 basis point decision carries almost no information. The vol is in the 50 basis point tail and in the statement and projections that come with it.
How the options market reads the setup
Index options price event risk through implied volatility (IV), the market's forecast of movement baked into option premiums. Into a meeting with a certain hike, IV usually stays bid on the front end only if the tail is live. A 15% chance of a larger move keeps the 2 p.m. ET decision on Dec. 9 relevant, because it is the one outcome that would force dealers to reprice hedges quickly.
The comparison that matters is IV versus realized volatility (RV), the movement the index has actually delivered. If SPX has been moving less than the options imply, sellers of premium get paid for holding through the print. If realized swings are already running hot after the CPI release, the market is paying fair value for protection, not rich value.
We don't know how dealers are positioned in gamma, meaning how much they must buy or sell stock to stay hedged as price moves. That figure shifts daily with open interest. Check the [GEX Profile](/optionsheatmap) before the meeting rather than assuming it. Dealers who are short gamma amplify moves, and dealers who are long gamma dampen them.
Vanna and charm after the event
The less obvious flow comes after the announcement. Vanna is how a dealer's delta changes when IV changes. Charm is how it changes as time passes. If the Fed delivers 25 basis points and IV collapses, vanna can pull dealer hedges in a direction that supports the index, since put hedges lose delta as vol falls.
A 50 basis point surprise reverses that. IV jumps, put deltas grow, and dealers sell into weakness. That asymmetry is why a 15% tail deserves attention even when the headline probability looks small.
Treat large print flow in the days before the meeting with suspicion. A big put or call buy in SPY or QQQ can be a hedge against a stock position or one leg of a spread. Bid-side prints in particular point to selling, not buying. The [Whale Alerts dashboard](/whalealerts) shows side and size, which is the minimum needed to separate protection from a directional bet.