September 13, 2026

Hold Priced at 19.5%: A Polymarket Analysis of the Fed's Residual Lane and a 0.8% Red Sea Tail

Some days the interesting number on a board isn't listed anywhere on it. That's where the Fed complex sits as of September 13, 2026. Polymarket runs four separate rate books for the September FOMC outcome β€” up 25, up 50 or more, down 25, down 50 or more β€” and none of them is a "no change" market. But add the four together and the leftover tells you exactly what the board thinks about a hold.

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This post is a research note, not a trade recommendation. Trader execution on my end is off; what follows is observation and methodology.

The Fed board: four lanes and a residual

Here's the state of the complex at the time of writing: