Will American mask usage be 75% or higher on April 14th, 2021?

This is a market on whether the American "observed mask usage" metric will be above 75% on April 14th, 2021. This market will resolve when data is first made available for the date of April 14th, 2021. This market will resolve to "Yes" if the metric is 75% or higher on the resolution date, and “No” otherwise. There will be no delay in resolutions for any incoming data updates or revisions past the initial publication of data for April 14th. The resolution source for this market will be the Institute for Health Metrics and Evaluation’s website, https://covid19.healthdata.org/united-states-of-america?view=mask-use&tab=trend. Specific, non-rounded data is available for download at http://www.healthdata.org/covid/data-downloads. This data will be prioritized for resolution in the event that the headline number displayed on Health Data's graph does not accurately reflect the specific, non-rounded datapoint. Observed mask use represents the percentage of the population who say they always wear a mask in public. In the event of ambiguity in terms of the market outcome, the market will be resolved at the sole discretion of the Markets Integrity Committee (MIC).

How trading works

Polymarket uses a central limit order book (CLOB) model — you can buy or sell shares of any outcome at the current market price, or place limit orders at your target price. All positions are settled in USDC when the market resolves.

Resolution

Markets resolve through UMA's Optimistic Oracle. After the market closes, a proposer submits a resolution, followed by a 2-hour dispute window. If no dispute is raised, the resolution is accepted. Disputed markets go to UMA token holder vote.