Robert Reich:

Just when you thought Wall Street couldn’t sink any lower – when its myriad abuses of public trust have already spread a miasma of cynicism over the entire economic system, giving birth to Tea Partiers and Occupiers and all manner of conspiracy theories; when its excesses have already wrought havoc with the lives of millions of Americans, causing taxpayers to shell out billions (of which only a portion has been repaid) even as its top executives are back to making more money than ever; when its vast political power (via campaign contributions) has already eviscerated much of the Dodd-Frank law that was supposed to rein it in, including the so-called “Volker” Rule that was sold as a milder version of the old Glass-Steagall Act that used to separate investment from commercial banking – yes, just when you thought the Street had hit bottom, an even deeper level of public-be-damned greed and corruption is revealed.

Libor is the benchmark for trillions of dollars of loans worldwide – mortgage loans, small-business loans, personal loans. It’s compiled by averaging the rates at which the major banks say they borrow.

So far, the scandal has been limited to Barclay’s, a big London-based bank that just paid $453 million to U.S. and British bank regulators, whose top executives have been forced to resign, and whose traders’ emails give a chilling picture of how easily they got their colleagues to rig interest rates in order to make big bucks. (Robert Diamond, Jr., the former Barclay CEO who was forced to resign, said the emails made him “physically ill” – perhaps because they so patently reveal the corruption.)

But Wall Street has almost surely been involved in the same practice, including the usual suspects — JPMorgan Chase, Citigroup, and Bank of America – because every major bank participates in setting the Libor rate, and Barclay’s couldn’t have rigged it without their witting involvement.

In fact, Barclay’s defense has been that every major bank was fixing Libor in the same way, and for the same reason. And Barclays is “cooperating” (i.e., giving damning evidence about other big banks) with the Justice Department and other regulators in order to avoid steeper penalties or criminal prosecutions, so the fireworks have just begun.

There are really two different Libor scandals. One has to do with a period just before the financial crisis, around 2007, when Barclays and other banks submitted fake Libor rates lower than the banks’ actual borrowing costs in order to disguise how much trouble they were in. This was bad enough. Had the world known then, action might have been taken earlier to diminish the impact of the near financial meltdown of 2008.

But the other scandal is even worse. It involves a more general practice, starting around 2005 and continuing until – who knows? it might still be going on — to rig the Libor in whatever way necessary to assure the banks’ bets on derivatives would be profitable.

This is insider trading on a gigantic scale. It makes the bankers winners and the rest of us – whose money they’ve used for to make their bets – losers and chumps.