http://www.bloomberg.com/news/articles/2015-11-04/high-frequency-trader-virtu-falls-as-currency-profit-slides

https://theoptionsinsider.com/occ-announces-cleared-contract-volume-down-in-october/

http://www.chicagotribune.com/business/ct-spoofing-trial-1104-biz-20151103-story.html

http://www.bloomberg.com/news/articles/2015-11-04/pound-options-ignore-super-thursday-to-brace-for-nfp-analysis

http://www.fiercefinanceit.com/story/new-bats-options-market-edgx-options-goes-live/2015-11-03

http://blogs.wsj.com/moneybeat/2015/11/03/options-traders-bet-on-big-move-in-facebook-shares-after-earnings/

http://www.bizjournals.com/chicago/news/2015/11/03/protesters-briefly-shut-down-cbot-calling-for-new.html

http://www.bloomberg.com/news/articles/2015-11-03/u-s-index-futures-little-changed-as-stocks-erase-august-losses

http://www.cboeoptionshub.com/2015/11/03/vix-weeklys-options-average-daily-volume-tops-25000-in-first-month-of-trading/

http://www.reuters.com/article/2015/11/03/us-batsglobalmarkets-iexgroup-exchange-idUSKCN0SS1PH20151103

http://blogs.wsj.com/moneybeat/2015/11/03/options-traders-buying-lottery-tickets-on-tesla-ahead-of-earnings/

http://marketsmedia.com/nyse-options-moves-on-pro-cust/