Polymarket and Kalshi are racing to turn more major events into opportunities to place bets, including everything from daily temperature highs during a New York City heat wave to the latest contestant to be eliminated from “Love Island,” the reality TV hit. That’s helped the young markets become ...

Polymarket and Kalshi are racing to turn more major events into opportunities to place bets, including everything from daily temperature highs during a New York City heat wave to…

Prediction market Kalshi is generating more than $2 billion in annualized revenue, up about three times from November, as traders betting on NBA and World Cup games drove a surge…