Kalshi reports record trading volumes during Masters weekend, underscoring the explosive growth of prediction markets. Meanwhile, industry leader Polymarket takes a hardline stance against insider trading, implementing stringent new rules to preserve market integrity.

The platform has updated its terms to explicitly prohibit trading on non-public information, including tipping off associates or allowing officials to bet on events they can influence. Violators face wallet bans, fines, or legal action. "Markets thrive on clarity," states Polymarket's CLO Neal Kumar.

This regulatory push comes as prediction markets gain mainstream traction. Both Polymarket and Kalshi recognize that maintaining trust is paramount as institutional interest grows. The moves signal a maturation of the sector, with platforms proactively addressing concerns that once plagued traditional financial markets.