FRONTLINE takes you inside the rapid rise of credit default swaps, including the voices of those who created them. With the real estate market booming, bankers successfully tweaked the credit default swap to bundle up and sell home mortgage loans to eager investors. But despite the money flowing into banks’ coffers, credit default swaps also loaded the financial system with lethal risk. And when the housing bubble burst, the credit default swaps — originally designed to stabilize the system — brought the global economy to its knees. Regulators, who had often stood on the sideline and allowed Wall Street to police itself, saw the ugly consequences rapidly unfold before them.