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/

http://www.cnbc.com/2016/10/26/goldmans-simple-plan-for-beating-the-market-during-earnings-season.html

http://www.bloomberg.com/news/articles/2016-10-28/u-s-said-to-probe-tullett-bgc-tfs-icap-over-currency-options-iutjsxbh

http://www.investing.com/news/stock-market-news/bloomberg:-citi-reaps-$300m-derivative-profit-435386

http://www.investing.com/analysis/friday-stock-market-forecast-200161278