Good article that compares investing versus gambling. It didn't talk much about some strategies gamblers use to mitigate risk, such as forming pools and 90-10 splits. Good article nonetheless.
http://www.investopedia.com/articles/basics/09/compare-investing-gambling.asp?partner=yahoosports
http://www.investopedia.com/articles/basics/09/compare-investing-gambling.asp?partner=yahoosports