The multi-billionaire hedge fund magnate Ken Griffin, who founded the Chicago-based Citadel Securities, has locked down a $49 million mortgage from Citibank at 60 Blossom Way in Palm Beach. The loan was arranged by Providencia Partners. Griffin originally purchased the 18,452 SF mansion, which was built in 2008 and sits on 3.6 acres, in September 2019 in cash from real estate investor Frank McCourt.