So far, Penn National’s (NASDAQ:PENN) Barstool Sportsbook platform has yet to become much of a threat. Flutter Entertainment’s (OTCMKTS:PDYPY) FanDuel unit, which also got its start as a daily fantasy sports operator, currently holds the most market share at 50%. If another one follows — or worse yet, if the Federal Reserve gives up on its “transitory inflation” thesis and shifts from dovish to hawkish monetary policy — we could see a more serious correction.