http://www.cboeoptionshub.com/2016/05/05/20366/

http://tickertape.tdameritrade.com/options/2016/05/volatility-update-late-april-67523

http://tradinggods.net/trading-gods-blog/us-stocks-try-gains-volatile-week/

http://www.bloomberg.com/news/articles/2016-05-05/brexit-uncertainty-drags-u-k-economy-to-near-stagnation-inu1qs7h

http://www.thetradenews.com/Regions/Americas/US-firms-agree-SEC-form-for-ATS-transparency-lacks-clarity/

http://finance.yahoo.com/news/vix-etfs-could-something-talk-125041418.html

http://www.thetradenews.com/Trading-Venues/LSE-denies-ICE-s-claims-over-merger-talks/

http://www.financemagnates.com/institutional-forex/execution/itiviti-expands-equity-options-market-reach/

http://www.reuters.com/article/us-funds-sohn-options-idUSKCN0XV2IF?mod=related&channelName=businessNews

http://tradinggods.net/trading-gods-blog/vix-daily-update-volatility-making-comeback/

http://www.bloomberg.com/news/articles/2016-05-04/vix-can-be-deceiving-as-steep-curve-shows-uncertainty-chart

http://www.fool.com/investing/general/2016/05/04/cboe-holdings-inc-earnings-boosted-by-spx-and-vix.aspx