Trading
Chiefs option on Polymarket Broncos vs. Chiefs submarket drops to 23.5%
The Chiefs option in Polymarket's Broncos vs. Chiefs submarket for the 4Q Spread -4.5 contract fell sharply from 51.5% to 23.5% within one hour on September 14, 2026, a 28 percentage-point swing.
Why this matters?
Demonstrates the real-time price sensitivity of sports event contracts to in-game developments, highlighting how quickly implied probabilities can reprice during live NFL action.
The bigger picture
Polymarket joins Kalshi in showing how live NFL action now drives sharp repricing on registered prediction markets, with both platforms tracking real-time injury and game-state swings that sportsbook-backed venues like Novig and FanDuel must match to retain trading flows.
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