Resolves YES if the US National Hurricane Center names a new tropical or subtropical storm in the Atlantic basin (Atlantic Ocean, Caribbean Sea or Gulf of America) between the creation of this market and 23:59 UTC on November 30, 2026. Since Josephine was the season's tenth named storm, the next name on the list is Kyle.
What counts: the NHC issues an advisory with the system at tropical-storm or subtropical-storm strength (39 mph / 34 kt or more) and gives it a name, with that first named advisory dated on or before November 30 (UTC). A tropical depression that never gets named does not count. Eastern and Central Pacific storms do not count.
Source: NHC advisories and the active-storms list at https://www.nhc.noaa.gov/ (archive: https://www.nhc.noaa.gov/archive/2026/). Operational naming decides. Later reanalysis that adds or removes a storm does not change the result.
Context (Oct 26): ten named storms so far, the first hurricane (Isaias) did not form until October 8, and a strong El Niño is under way. The NHC's 8 AM EDT outlook on Oct 26 said formation "is not expected during the next 7 days". In most seasons since 1991 a named storm formed somewhere between late October and November 30, but it was far less common in strong El Niño years (1997, 2002, 2006 and 2023 had none; 2009 and 2015 did).
I will not trade in this market.
Starting this at 33%. In a typical year I'd say well over half, since in most seasons since 1991 something got named between late October and the end of November. But this is a strong El Niño year, and in those years it mostly didn't happen: 1997, 2002, 2006 and 2023 had nothing, while 2009 (Ida) and 2015 (Kate) did. On the other side, this season has woken up late, with Isaias on Oct 8 and Josephine around Oct 18. NHC's outlook this morning says nothing is expected for the next 7 days (outlook text), so in practice the window is about Nov 2–30.
What would move me: NHC putting an area on the 7-day outlook (up), or another quiet week with strong westerly wind shear over the Caribbean (down).