In 2011, McFarland landed what seemed from the outside to be an unenviable job. She came on as the third post-bailout CFO at Fannie Mae as the troubled mortgage giant was hemorrhaging cash. Since the bank entered conservatorship, it has cost taxpayers more than $85 billion. Last year, though, Fannie Mae began to turn a profit. In the second quarter of this year, it pulled in $10 billion, its sixth consecutive quarter of not losing money.