http://www.wsj.com/articles/safety-comes-at-steep-prices-in-options-1477915201

http://www.forbes.com/sites/petertchir/2016/10/30/vix-sending-a-scary-message/#334778d14553

http://www.marketwatch.com/story/game-changer-could-derail-what-has-traditionally-been-a-great-stretch-for-stocks-2016-10-31?siteid=yhoof2

http://www.fow.com/3597427/CBOE-eyes-ETF-market-after-Bats-merger.html

http://www.economiccalendar.com/2016/10/29/cboe-vix-rises-22-this-week-as-volatility-returns-to-us-stocks/

http://www.washingtonpost.com/news/wonk/wp/2016/10/28/stocks-slide-and-gold-jumps-after-the-fbi-says-its-investigating-clintons-emails-again/

http://www.thetradenews.com/Asset-Classes/Equities/Equity-trading-declines-13–across-Europe/

http://www.proactiveinvestors.com/companies/news/168223/volatility-king-cboe-hit-bylow-volatility-168223.html

http://www.bloomberg.com/news/articles/2016-10-27/europe-s-top-trading-firms-have-some-good-news-as-revenue-jumps

http://www.marketwatch.com/story/cboe-revenue-slides-16-on-declining-trade-volume-2016-10-28

http://www.thetradenews.com/Trading-Venues/Deutsche-Boerse-sells-shares-in-Bats-amid-flat-quarterly-earnings/

http://www.cboeoptionshub.com/2016/10/27/earnings-week-1031-114/