here's some reading regarding "printing money"
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http://www.wanniski.com/showarticle.asp?articleid=3856
When you read about the Fed “printing money,” this is what reporters are talking about. The Fed doesn’t actually print money. That’s the job of the U.S. Mint. It does not create dollar bills of various denominations until it gets an order from the Federal Reserve. It is the central banks that directs the “money” to its member banks, which are willing to give up interest-bearing bonds in order to get that cash for the liquidity that its customers can turn into cash for transaction purposes. Remember here that most dollar transactions don’t even need “cash” in order to close. Most people pay their bills with checks or credit cards. Corporations pay their bills electronically, moving around debit and credits. This is why it is important for SSU students to understand the difference between “liquidity” and “currency.” The term “liquid” means you have an asset that can easily be converted into a real good or service. WalMart will not take a bond for a basket of stuff, nor will dentists or lawyers. They want liquid money.
Going back to the Fed’s purchase of a government bond with “ink money.” At the conclusion of a purchase, the Federal Reserve has in its portfolio an asset of $1000 that is paying interest and a liability of $1000 that is not. The interest amount covers the expenses of managing the central bank, and funds in surplus are given to the Treasury as part of its general revenues. The Fed also has the authority to reverse this process. It can decide to withdraw liquidity from circulation, doing so by taking the $1000 bond from its portfolio of assets and selling it on "the open market," to banks that are members of the Federal Reserve System. The decision on whether or not to buy bonds to create money or sell bonds to extinguish money is made by the Fed's Board of Governors and the presidents of the regional Federal Reserve banks. They come together every several weeks as "The Open Market Committee" to decide on whether to buy, sell or hold steady. Their decision is communicated to the "open market desk" in New York City, which implements the policy decision through its own operating procedures.
Conceptually, the process of creating money adds "reserves" to the banking system. The banks are required by law to hold a percentage of their deposits in ready cash or the equivalent of cash -- its own checking account at the Mint. These reserves are a cushion to meet potential demands of the depositors. Thus, a Fed decision to "ease" may put more liquidity into the banking system than the banks are required to keep by law. This will push the banks into finding borrowers who will take the surplus liquidity in exchange for an asset that will earn a profit for the bank. A Fed decision to "tighten" may take out reserves that the banks are holding in accordance with legal requirements. This means the banks have to sell assets to private buyers in order to get their cash reserves up to par.