Hedge Funds and their 13F filing data

A number of articles have focused on investment banks and how their prime brokerage divisions service hedge funds.  I came across this article a couple of weeks ago regarding 13F filings by hedge funds.  Hedge funds report their holdings to the SEC on a quarterly basis.  Christopher Holt of the website AllAboutAlpha.com has an interesting article regarding the trading volume and performance of securities on funds' reports after publication of the filing information.  You can access the article here.