Recession Risk — 2026 and 2027

The probability of an NBER-declared US recession by year-end 2026 was the defining macro contract of the spring. It is now close to settled, and the interesting book has moved out a year.

Kalshi's 2026 binary trades at 6% on $10,752 of 24-hour volume, against $923,440 of open interest—almost all of the conviction on this page is committed to a question that is nearly resolved. With three and a half months left there is very little runway for an NBER-dated 2026 recession to begin, be observed and be declared.

The 2027 book prices 25%, four times the 2026 number across a single calendar boundary, on a contract that settles in January 2028. The market is not saying the expansion is safe; it is saying the risk sits past the horizon of the contract everyone was watching.

The policy backdrop changed on September 16. The Fed raised rates 25bp to 3.75–4.00%, and Kalshi's October meeting is a coin flip on a second move. A tightening central bank is a different input to a recession forecast than a holding one, and neither recession book has moved on it yet.

The step change, priced directly. Kalshi's NBER-specific binaries at both horizons: 6% for a recession starting in 2026, 25% for one starting in 2027. Same resolution source, same methodology, twelve months apart.

Kalshi's NBER-specific 2026 binary next to Polymarket's broader US-recession binary. The gap is now 6% against 10%—four points, where it held inside one or two for most of the year. Polymarket's looser resolution language is worth more when the policy path is uncertain, and that is the cleanest explanation for the widening.

The quarter-of-start Categorical is the timing view in principle; in practice every leg now refers to a quarter that has already passed without a declaration, and nothing has traded in twenty-four hours. Beside it, Kalshi's multi-country book on which economies enter recession before 2027—the cleanest read on whether US risk is idiosyncratic or global.

Recession odds do not move in isolation. The initial-claims and unemployment books reprice weekly and are the highest-frequency inputs into this question; the Fed's October meeting is the policy response function, and it is genuinely undecided. Both are covered in depth in the jobs and FOMC workspaces—here they serve as the sanity check on a 6% print.

• 6% now, 25% next year. The most informative number pair on this page. The market has not decided the cycle is over; it has decided 2026 is not the year and moved the risk into a contract with four more quarters of runway.
• The cross-exchange gap has widened to four points. 6% on Kalshi against 10% on Polymarket, where it sat inside a point for most of the year. That spread is the price of resolution language, and it moves when the macro path does.
• Open interest is where the conviction is. The 2026 binary holds $923,440 of standing position against $221,622 on 2027. Most of the money here is committed to a nearly-resolved question.
• The quarter Categorical is dead, not bearish. Every leg names a past quarter and nothing trades. Read it as an unwound book, not a forecast.
• The declaration lag is the mechanical constraint. NBER dates recessions retrospectively, often a year or more after the trough. A 2026 recession would essentially have to have already started for the 2026 contract to pay, which is most of why 6% is not lower.