Billionaire Idan Ofer purportedly used a 50-meter yacht owned by a company based in the Virgin Islands to secure a 15 million euro loan from Credit Suisse in 2015

US officials and international financial groups grappling with how to keep tabs on hidden trillions while avoiding privacy violations

Investments funneled through Cayman Islands, some from Saudi Arabia, raise possible conflicts of interest for Trump son-in-law