View full post at: 
http://economystified.blogspot.com/2013/07/liquidity.htmlOne night, I was out drinking with a few buddies of mine who were not economics majors (I was at the time).  I stood up from our table and announced to the gentlemen assembled that I had a "liquidity issue to resolve."
I was looking for the ATM.  My friends pointed me towards the bathroom.
True story.
On the surface, it might seem like a kinda boring, technical concept.  But once you understand it, you'll see it actually comes up all the time - in a many ways, our entire financial system revolves around it!
Think of money as something that either can be in a "solid" or a "liquid" state.  "Liquid" money is money that can be sloshed around RIGHT NOW.  It's cash in hand.
"Solid" money has to be made "liquid" before it can change hands - before it can "flow".  Solid money can be stuff like checking accounts or credit cards, but could also be real estate, or a car, or a stock share, or other sellable asset - something that can be taken to market, sold, and converted to liquid, flowable cash. 
A debt owed to you is also "solid" money.  If I write you an IOU for $50, yes, you could say that you have $50 more to your name.  But you can't use that money until I make good on the loan, and convert your IOU from a solid to a liquid.
Continue reading at: 
http://economystified.blogspot.com/2013/07/liquidity.html