Key Takeaways FanDuel parent Flutter Entertainment warned that its U.S. results will be lower than anticipated because too many NFL favorites won this season, giving customers better payouts.The online gambling company said the "customer friendly" wagering resulted in lowering full-year U.

Flutter Entertainment shares are trading lower in Tuesday's after-hours session after the company cut near-term guidance due to a period of "very unfavorable" sports results.

Flutter Entertainment has issued a profits warning after taking a hit of $438 million (£352m/€425m) as punters enjoyed a winning run on American football. The parent company of Paddy Power and Sky Bet said that one match alone, the Detroit Lions' 40-34 victory over the San Francisco 49ers on December 30, cost them $74m.

Some of the National Football League’s strongest teams are having dominant seasons—and that’s helping sports bettors beat the house. FanDuel owner Flutter Entertainment cut its fourth-quarter U.S. guidance late Tuesday,