Polymarket launched its Bitcoin Up or Down markets on its U.S. app on September 22, 2026, at 12:00 p.m. ET. Users wager on whether Bitcoin will finish each 15-minute window above or below a reference price set at the interval’s start. The markets operate continuously, 24 hours a day, seven days a week, with automated settlement and the option to exit positions before expiration. Chainlink’s BTC/USD oracle supplies the resolution data by aggregating prices from multiple sources. Bitcoin is currently the only asset offered in this format. The event contract product expands Polymarket beyond longer-duration political and economic markets and places it in closer competition with crypto derivatives platforms offering perpetual futures and short-dated options. Its classification could draw scrutiny from the Commodity Futures Trading Commission, which regulates Polymarket’s U.S. app and has been examining its operations. The agency previously took action against Polymarket in 2022, leading to a settlement and the platform’s temporary withdrawal from the U.S. market. Access is already restricted in some states, and competitors such as Kalshi are expected to monitor the product closely.