Cuban makes a lot of good points in this series, but fundamentals do exist. Compare his philosophy to Warren Buffet. Sure, Buffett does often get better deals not available to retail investors, such as the recent Goldman deal, but Buffett also buys plenty of common stock as well. (There is plenty of overlap in the philosophies as well...looking over his 2008 letter, seems like he favors dividend paying stocks, but don't hold me to that).