http://www.cnbc.com/id/101886917?__source=yahoo|finance|headline|headline|story&par=yahoo&doc=101886917

http://www.benzinga.com/news/14/07/4747478/vix-finally-getting-some-respect

http://dealbook.nytimes.com/2014/07/31/markets-end-july-in-dive-but-analysts-are-upbeat/?_php=true&_type=blogs&_r=0

http://www.efinancialnews.com/story/2014-07-31/gfi-cme-sale-what-it-means?mod=home-topmod=home-top&ea9c8a2de0ee111045601ab04d673622

http://www.chicagotribune.com/business/breaking/chi-cboe-earnings-20140801-story.html

http://blogs.wsj.com/moneybeat/2014/07/31/options-traders-bet-gopro-shares-will-keep-climbing/

http://www.reuters.com/article/2014/07/31/cftc-massad-idUSL2N0Q616720140731

http://www.advicetrade.com/middayminute/The-VIX-Starts-to-Rumble-on-the-Upside-201407312823.html

http://blogs.wsj.com/moneybeat/2014/07/31/options-suggest-tesla-results-wont-send-shares-on-another-wild-ride/

http://www.reuters.com/article/2014/07/31/cme-results-idUSL2N0Q60N020140731?feedType=RSS&feedName=financialsSector

http://www.reuters.com/article/2014/07/30/us-markets-regulations-iexgroup-idUSKBN0FZ09J20140730

http://www.efinancialnews.com/story/2014-07-31/gfi-cme-sale-what-it-means?mod=home-top