July 9, 2012
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.
Sit down and hold on to your chair.
What's the most basic service banks provide? Borrow money and lend it out. You put your savings in a bank to hold in trust, and the bank agrees to pay you interest on it. Or you borrow money from the bank and you agree to pay the bank interest.
How is this interest rate determined? We trust that the banking system is setting today's rate based on its best guess about the future worth of the money. And we assume that guess is based, in turn, on the cumulative market predictions of countless lenders and borrowers all over the world about the future supply and demand for the dough.
But suppose our assumption is wrong. Suppose the bankers are manipulating the interest rate so they can place bets with the money you lend or repay them - bets that will pay off big for them because they have inside information on what the market is really predicting, which they're not sharing with you.
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