Thierry Leyne, the Franco-Israeli financier who died last week in an apparent suicide, was in a dispute with a Swiss asset manager that alleged Leyne’s firm made “totally unauthorised” trades with its money.

Leyne, who according to an Israeli official committed suicide in Tel Aviv on October 23, was the business partner of former International Monetary Fund chief Dominique Strauss-Kahn and chief executive of Paris-listed Leyne Strauss-Kahn & Partners.