Fed Holds Steady in July as Wall Street's Largest-Ever Short Position in Fed Funds Rapidly Unwinds
Taylor Wilson
After the Fed held rates steady in July, the largest short position ever built in fed funds futures shed roughly 140,000 contracts in a single day — a ~$5 trillion notional bet collapsed, and the path to September is wide open again.
How big was this "largest-ever short"?
Open interest in the August fed funds futures contract — a vehicle for betting on the Fed's next rate move — topped 1 million contracts, roughly $5 trillion in notional value, an all-time record.
This means → the market put real money behind one view: the Fed would likely hike in July.
Before the decision, rate-swap markets implied a hike probability as high as ~50%, pricing in about 12.5 basis points of tightening before easing back to roughly 7 bps.
In plain terms = nearly half of Wall Street's money was on "hike" — and the Fed didn't move.
Why did the shorts get it wrong?
Strategist David Robin at TJM LLC noted the consensus behind the short: "The Fed needs to tighten to preserve credibility."
But Chair Kevin Warsh had already signaled caution — citing "family debates," task forces, and data dependence, hinting that July was too early to act.
This means → the market read the hawkish posture correctly but missed the escape clause Warsh left himself.
Robin added that after the decision, "the August contract corrected in under five seconds" — shorts had almost no time to exit.
How much did the marquee trades lose?
On June 16 — the day before Warsh's first meeting as chair — a single 50,000-contract short was placed at 96.350, with notional exposure of roughly $2.1 million per basis point.
Moments before the decision, the trade showed a paper gain of about $10 million; by the close it had swung to a loss of roughly $3 million.
A separate block of about 20,000 short contracts entered near 96.295–96.29 just before the decision; holding to the close would have meant a loss of approximately $6 million.
In plain terms = the biggest single trade went from +$10 million to −$3 million in five seconds — and because futures are anonymous, no one knows who took the hit.
Where did leveraged funds and dealers stand?
CFTC data show that since early May, leveraged funds — professional firms trading with borrowed capital — steadily built net short positions in fed funds futures to roughly a one-year high.
Dealers — banks and market-making desks — meanwhile pushed long positions to their own period high, acting as the counterparty to the leveraged shorts.
This reflects a classic setup: speculative money piles into one direction while market makers take the other side — this time the market makers won.
What does this mean for the September meeting?
Archr LLP founding partner Alan Taylor noted that hedging was attractive when hike pricing sat at only ~3 basis points, but risk rose as pricing climbed.
He believes some positions were closed when pricing reached 9 bps, adding that "the market never truly believed the probability would exceed 50%."
This means → the unwind doubles as a market test of Warsh's communication style and resets rate-hike expectations ahead of the September 16 meeting to near zero — the next pricing anchor will depend on inflation and employment data between now and then.
Content is for reference only, not financial advice.