Resolves according to this Polymarket:

On October 10, President Trump announced that the United States would apply a 100% tariff to all imports from China starting November 1 (see: https://truthsocial.com/@realDonaldTrump/posts/115351840469973590).

This market will resolve to “Yes” if a general 100% tariff rate or higher on imports into the United States from China goes into effect for any amount of time by November 1, 2025, 11:59 PM ET. Otherwise, this market will resolve to “No”.

For the purpose of this market, "goes into effect" means the start date of the tariffs (as set by legislation or executive action) must have passed without being further delayed or suspended. Only tariffs which are in effect will qualify. Tariffs which are paused, or which have been announced but not yet gone into effect will not be considered.

The general tariff rate refers to the base tariff rate paid on imports, including any general tariff the U.S. imposes on all imports (e.g. a 10% tariff on all U.S. imports and a 50% tariff on top of that on Chinese imports would equal a 60% tariff). Item specific exceptions or increases will not be considered (i.e. this market does not refer to the effective tariff rate).

A general tariff that includes item specific exceptions will still qualify, as long as a policy of a general 100% tariff on all imports into the United States from China is in effect.

This market's primary resolution source will be official information from the Trump administration; however, a consensus of credible information will also be used.