NFL backs New Jersey authorities in SCOTUS petition over Kalshi

What happened: The NFL filed an amicus brief backing New Jersey officials asking the Supreme Court to review their case against Kalshi over sports event contracts. Key numbers: NFL data cited more than half of prediction market trading volume on the first Sunday of the season, about $1.8 billion of $3.3 billion, related to the NFL. Kalshi has until Nov. 9 to respond. Why it matters: The NFL argues many event contracts threaten game integrity and are susceptible to manipulation. States say the CFTC and state dispute is a national turf war needing Supreme Court guidance.

High-priority alert based on source significance and keyword relevance.

High-priority alert based on source significance and keyword relevance. — impact context not separately stored; see What changed.