I'm not understanding how fractional reserve banking is creating money from nothing. The assets and liabilities still balance, right? Borrowing money from consumers at almost no interest and re-lending it at a higher interest rates doesn't "create" more money than was already in the system. What am I missing?
An extremely simplified artificial example, without interest rates and a 0% reserve.
-You go to the bank and deposit $100 for one year, that is, you can't ask your money for one year but you can transfer your deposit certificate.
-The bank knows Jack that needs to borrow $100 for one year the same day you deposit your money. The bank lends the money.
-Now Jack have a note of $100 and you have a certificate of $100 that can be used like cash (not really, but its negotiable). Then, there are $200 in the streets. The system created money. The system is not the bank; it includes the bank, Jack, you and your society.
-Suppose Jack wanted the money to buy some item that costs $100. Suppose you want the same item but you think "Bummer, I deposited my money ... wait a minute, I have my negotiable certificate" and you bid for the same item. The merchant sees the avid demand and says "the item is now $150"; you have inflation led by monetary creation -secondary creation-.
Of course you won't use your deposit certificate -or the system could prevent you from using it-, there are interest rates, fees, taxes and mainly there is delay in the system. Surely Jack will use the money he borrowed and the chap who got it will go to another bank to deposit the money again ... and the wheel is moving.
This can go on to the infinite, flooding the streets with means of payment. That's why "fractional": suppose the bank can lend 80%, the multiplier will be 100/(100-80) = 5, for each $100 note there will be another $400 created by the whole economic system. If $500 is too much, there will be inflation. The central bank -or federal reserve- by creating or destroyng a $100 bill regulates the system.