The
reserve requirement is 10%.
A bank receives a $100 deposit. It may lend out $90 of that.
The borrower writes a check to another person who deposits $90.
The bank that receives that deposit can lend out $81... until a maximum of $1000.
$100.00 + $90.00 + $81.00 + $72.90 + $65.61 + $59.05 + $53.15 + $47.84 + $43.06 + $38.75 + $34.88 + $31.39 + $28.25 + $25.43 + $22.89 + $20.60 +
$18.54 + $16.69 + $15.02 + $13.52 + $12.17 + $10.95 + $9.86 + $8.87 + $7.98 + $7.18 + $6.46 + $5.81 + $5.23 + $4.71 + $4.24 + $3.82 + $3.44 + $3.10 +
$2.79 + $2.51 + $2.26 + $2.03 + $1.83 + $1.65 + $1.49 + $1.34 + $1.21 + $1.09 + $0.98 + $0.88 + $0.79 + $0.71 + $0.64 + $0.58 + $0.52 + $0.47 + $0.42
+ $0.38 + $0.34 + $0.31 + $0.28 + $0.25 + $0.23 + $0.21 + $0.19 + $0.17 + $0.15 + $0.14 + $0.13 + $0.12 + $0.11 + $0.10 + $0.09 + $0.08 + $0.07 +
$0.06 = $999.99
That single deposit of $100 cash has the potential to expand into a total of 72 deposits with a sum equal to $999.99. It can all be at one bank, held
in 72 customer accounts, or it can be at 72 different banks.
So you can see that the existance of 1 single hundred dollar Federal Reserve Note can expand into $899.99 worth of ''fake'' deposit receipts
through the action of a lot of borrowing. Let's hope we don't all rush to withdraw our cash at once!

Relax. Read
How Currency Gets into Circulation
Is this the 72 virgins we hear about, or is it just 1 big nasty whore of Babylon?
Either way I like it.
[edit on 22-2-2010 by Cabaret Voltaire]