Perhaps it depends on how you define "fraud" ??

From an article by Matt Taibbi at Rolling Stone:

Last week, a federal judge in Mississippi sentenced a mother of two named Anita McLemore to three years in federal prison for lying on a government application in order to obtain food stamps... The total "cost" of her fraud was $4,367.

She has paid the money back. But paying the money back was not enough for federal Judge Henry Wingate... He ultimately gave her three years, saying, "The defendant's criminal record is simply abominable …. She has been the beneficiary of government generosity in state court."

Compare this court decision to the fraud settlements on Wall Street. Like McLemore, fraud defendants like Citigroup, Goldman Sachs, and Deutsche Bank have "been the beneficiary of government generosity." Goldman got $12.9 billion just through the AIG bailout. Citigroup got $45 billion, plus hundreds of billions in government guarantees.

All of these companies have been repeatedly dragged into court for fraud, and not one individual defendant has ever been forced to give back anything like a significant portion of his ill-gotten gains. The closest we've come is in a fraud case involving Citi, in which a pair of executives, Gary Crittenden and Arthur Tildesley, were fined the token amounts of $100,000 and $80,000, respectively, for lying to shareholders about the extent of Citi’s debt. Neither man was forced to admit to intentional fraud. Both got to keep their jobs...

This is the reason why all of these settlements allowing banks to walk away without "admissions of wrongdoing" are particularly insidious. A normal person, once he gets a felony conviction, immediately begins to lose his rights as a citizen. But white-collar criminals of the type we’ve seen in recent years on Wall Street – both the individuals and the corporate "citizens" – do not suffer these ramifications. They commit crimes without real consequence, allowing them to retain access to the full smorgasbord of subsidies and financial welfare programs that, let’s face it, are the source of most of their profits... 

More at the link.