Interesting interview by John Bogle.

John Bogle the creator of Vanguard Index 500 is worth always listening too. Recently Mark Cuban the owner of the Dallas Mavericks disputed the merits of long term investing. Watch this video interview in link below. One interesting component in the interview was the fact that ETFs are causing lot of market volatility as they make up 40% of trades in the market everyday. Understanding their impact is very important.