July 9 (Reuters) - SVB Financial Group, which formerly owned bankrupt Silicon Valley Bank, has sued the U.S. Federal Deposit Insurance Corporation in a bid to recover $1.9 billion in cash the regulator has kept since it took over the group's banking subsidiary in March, the Financial Times reported late on Sunday. (Reporting by Urvi Dugar in Bengaluru; Editing by Krishna Chandra Eluri)