Polymarket

With over 30 million users globally, Polymarket is the world's largest prediction market. Trade on live sports, geopolitics, elections, news, tech, and culture. Buy shares based on probability. if something has a 67% chance of happening, buy shares for $0.67 and cash in $1 if you're right. Features live in-game trading, tightest spreads, lowest fees, and no limits. Now fully legal in all 50 US states and backed by NYSE's parent company.