Citi warns against investing in Flutter Entertainment due to its slow business and uncertainty over its stateside prediction market push. The bank's research arm has double downgraded the owner of FanDuel to sell from buy. The company's shares have dropped 48% since the beginning of the year. This comes after it forecasted more modest growth in the quarters ahead, particularly for its U.S. business. Citi's call contradicts consensus on Wall Street, with 20 of the 25 analysts covering Flutter now having a buy or strong buy.