CHICAGO (AP) — Cardi B was part of Bad Bunny’s Super Bowl halftime show . What she did exactly, well, that turned into a perplexing question for two major prediction markets. At least one Kalshi trader filed a complaint with the Commodity Futures Trading Commission over how the prediction market handled Sunday’s appearance by the Grammy-winning rapper. The result of a similar event contract on Polymarket also drew the ire of some users on that platform. Prediction markets provide an opportunity