This is what Mr. Market is really like... (IMAGE)

Benjamin Graham, in his book "The Intelligent Investor", which I'm still getting around to finishing, wrote how when you invest in Stocks, you're getting in business with a partner known as "Mr. Market". Mr. Market is a moody fellow, manic depressive actually. You're never going to know what his mood is going to be.  Things could be looking up, and Mr. Market will depress the market down.  Things could be looking horrible, and Mr. Market will just go out there and buy, buy, buy.

This is that idea...in cartoon form. Thanks, Gizmodo for spotting it first.