The Biden administration’s rollback of sanctions against Venezuela is offering a helping hand to bondholders owed $63 billion from the government in Caracas, many of whom haven’t been paid a dime in nearly six years.

Since the Biden administration loosened sanctions on President Nicolás Maduro’s government last week and allowed U.S. investors to once again buy and sell Venezuelan debt, trading in the South American country’s sovereign bonds has intensified and prices are rallying. Traders estimate that between $2 billion and $3 billion of Venezuelan government bonds have traded hands in the week since the ban was lifted.