It later emerged that a whistleblower at Lehman, who raised concerns about the way it accounted for risky loans, lost his job shortly after speaking out.
Because it was able to write off risky loans early this year, according to James Kurz, a senior Fonkoze financial adviser, its portfolio at risk has fallen to 5 percent in recent months.
The banks made too many risky loans which now can't be repaid, and they speculated in property whose value has now dropped.
Already, the agency's reserves have been heavily eroded by risky loans it took on in 2008-09 to shore up the housing market.