Kalshi Booms Amid World Cup Windfall, Legal Battles, and Netflix Dispute

Prediction market Kalshi has seen explosive growth during the 2026 FIFA World Cup, recording $27 billion in trading volume and roughly 3 million users, nearly double its projections Source: CNA. However, the company faces multiple legal and ethical challenges, including a defamation dispute with Netflix and ongoing battles with state regulators.

The Netflix Documentary Dispute

Kalshi sent Netflix a cease-and-desist letter over the trailer for Instadocs: The Prediction Games, claiming it contains a fabricated trade slip and misleadingly suggests users can trade in Nevada, where Kalshi is banned Source: TechCrunch. Netflix responded that none of the documentary footage was fabricated; the trade shown was from May 2025, prior to the Nevada court order Source: TechCrunch. The documentary is set to stream July 26.

Regulatory and Legal Headwinds

• State gambling lawsuits: Massachusetts, Washington, and others have sued Kalshi, arguing its event contracts constitute illegal gambling. Kalshi maintains it is a federally regulated financial product, not a sportsbook Source: NPR.
• Insider trading probes: A White House teleprompter operator is under investigation for allegedly using inside knowledge to profit on Kalshi's 'mention markets' Source: CNN. Separately, the Supreme Court faces pressure to ban justices and clerks from prediction markets amid ethics concerns Source: CNN.
• Wisconsin warning: The state elections commission warned that voting after betting on an election could be a felony, prompting pushback from Kalshi and Polymarket Source: Gizmodo.

New Markets and Institutional Interest

Despite the controversies, Kalshi is expanding rapidly. It launched a 'Midterms Hub' for election odds and polling Source: Coindesk, and announced a pilot for betting on clinical trial outcomes and FDA decisions Source: The Guardian. Institutional trading platform Talos integrated Kalshi, allowing clients to trade event contracts alongside crypto Source: Cointelegraph. Meanwhile, Robinhood is reportedly in talks with Crypto.com to offer prediction markets, a sign of growing mainstream interest Source: Cointelegraph.