Arizona asks Ninth Circuit to vacate sports event contracts ruling, citing Kalshi v. Nevada

Robinhood asks Supreme Court to review Ninth Circuit prediction markets ruling

Robinhood's petition gives the Supreme Court a third request to resolve the circuit split that now endangers every CFTC-registered platform offering sports-linked contracts. Crypto.com and New Jersey have already filed their own petitions after the Ninth Circuit stripped Kalshi's federal shield in Nevada. The justices now face pressure from multiple directions to settle whether the Commodity Exchange Act preempts state gambling law.

Without cert, Robinhood must prepare for the same geofence-by-geofence fight that is already fragmenting Kalshi's national market. Each new state filing compounds legal budgets while splitting liquidity across borders. A grant would freeze that cascade and deliver uniform federal rules. A denial leaves Robinhood defending its sports contracts before fifty separate state gaming commissions with circuit precedent running against it.

Yale study finds 3% of Polymarket traders capture 27% of all profits

The study gives retail traders a concrete reason to rethink their edge on Polymarket. If a single-digit percentage of accounts sweeps more than a quarter of profits, the median participant is structurally behind. Polymarket now faces pressure to disclose whether that concentration stems from superior information, algorithmic execution, or simply higher volume. Competitors like Kalshi and ForecastEx can use the paper to argue their own markets are less top-heavy, potentially drawing traders who fear being outgunned.

For regulators, the finding raises questions about fair access without mandating any specific rule. The sharper risk is reputational: a platform branded as winner-take-most may struggle to retain casual users who subsidize the core experience. Yale's second Polymarket study in under two weeks builds on prior work examining how claim unbundling affects investor behavior, suggesting a sustained research program rather than an isolated finding.

Polymarket whipsaws on CLARITY Act odds as Senate vote nears

The CLARITY Act contract is becoming a case study in how political prediction markets handle low-liquidity legislative events. Polymarket's swing from 14% to 30% to 18% in under 24 hours shows how a single procedural move — a rejected GOP offer — can flip sentiment faster than any policy substance changes. For crypto traders, these odds have become a real-time macro signal: Bitcoin moved with the probability climb, then gave back gains on the reversal.

The platform faces a credibility test if final passage differs sharply from closing prices. For Kalshi, whose parallel contract hit 64% before retreating, the spread between venues invites arbitrage attempts that may fail on differing settlement criteria. The platform that settles closest to actual outcome gains authority for future legislative markets.

Women athletes blast Novig's nude Sydney Sweeney ad for sexualizing sports

The athlete backlash turns Novig's headline creative into a brand-safety problem that could restrict ad placement. Critics framed the spot as damaging to women in sports. That line carries weight with network and publisher brand-safety teams. Novig must now defend the creative to preserve media buys, or pull it and waste production spend.

Sweeney's equity stake ties her directly to Novig's outcome, so both share the downside if partners retreat. For a platform banking on celebrity differentiation from Polymarket and Kalshi, the controversy tests whether attention converts to accounts or to advertiser wariness. The first prediction market to watch a celebrity deal collapse under public pressure will set the risk premium every rival prices into its next star contract.

The backlash arrives just hours after Novig announced Sweeney took an equity stake to star in the campaign, making this the first prediction-market celebrity deal to face coordinated athlete opposition before its media buy could scale.