Government Shutdown Watch — Oct 1, 2026

The FY2027 appropriations deadline is October 1, 2026, and the live book has moved from the settled DHS funding fight to whether the government lapses again at the fiscal-year boundary. Kalshi's Government shutdown on Oct 1, 2026? binary is the anchor and is turning over roughly $19k in 24-hour volume with about $103k of lifetime volume behind it—the deepest read on the deadline anywhere.

Manifold lists the same October 1 question independently plus a wider before-January-2027 binary, and Kalshi's shutdown-count Range distributes how many lapses 2026 produces in total—the spring DHS shutdown already counts as one. Polymarket's compound Categorical ties a second shutdown to control of the House, which is the only book in the stack that prices the funding fight and the midterms together.

Anchor: Kalshi—Government shutdown on Oct 1, 2026? · settles October 2, 2026.

Three binaries on the same underlying question at three horizons. Kalshi prices the October 1 boundary directly; Manifold's independent October 1 book is the cross-exchange check; Manifold's before-January-2027 binary widens the window to any lapse in the back half of the year. The spread between the narrow and wide books is the market's implied probability that a lapse happens after the deadline rather than at it.

• The narrow-versus-wide binary spread. Kalshi's October 1 book and Manifold's before-January-2027 book price the same risk over different windows. When the wide book runs well ahead of the narrow one, the market is saying a continuing resolution passes the deadline and the fight moves to December.
• Count Range mass on "2". The DHS lapse already banked one shutdown for 2026, so this is the cleanest unconditional second-shutdown probability in the stack—and it should track the October 1 binary closely. Divergence means one of the two books is stale.
• The compound House Categorical. Polymarket is the only venue pricing shutdown risk jointly with control of Congress. It is a thin book, so treat it as a structural read rather than a price signal.
• Liquidity is asymmetric. Kalshi carries essentially all the depth here; the Manifold and Polymarket books are light. Read Kalshi for the price and the others for independent confirmation.
• Watch the September calendar. Appropriations markets historically reprice hardest in the last two weeks before the deadline, when the shape of any continuing resolution becomes public.

Kalshi's Range distributes the total count of 2026 government shutdowns. The spring DHS lapse already counts as one, so mass on "2" is the direct read on a second shutdown; mass on "3" and above prices a genuinely broken appropriations year. Polymarket's compound Categorical crosses the same question with the 2026 House winner—when one bucket diverges from the unconditional Range mass, the two books disagree on whether divided government causes lapses.