As March Madness begins, 5 ways for investors to profit from the boom in sports betting By: MarketWatch March 18, 2021 at 12:41 PM EDT Two stocks -- Penn National and Caesars -- are now in the S&P 500 index. Read More >> Related Stocks: Caesars Entertainment Inc Draftkings Inc Fubotv Inc Kindred Group Plc. Penn Entertainment Inc Roundhill Sports Betting & Igaming ETF William Hill Plc