The ICE dollar index slipped under 100 in late New York trading on 31 July, ending the session around 99.8 (ICE data via Yahoo Finance) before printing 99.96 on 3 August.
The 31 July market resolves YES if the DXY official close on 31 July 2026 is above 100.00. Dollar index markets resolve on the ICE US Dollar Index (DXY) official close for the stated date, as published by ICE and reported by Reuters and the Wall Street Journal. If markets are closed on a resolution date, the prior trading day's close applies.
Since 1985 the dollar has lost about 9% or more in a year five times. We used the dollar index. We checked what happened in the following year. In three cases the fall went on, and in two the dollar bounced back. History is close to split.