http://www.chicagobusiness.com/section/trading-pits#intro

http://www.pionline.com/article/20150615/PRINT/306159989/volatility-fears-push-nervous-investors-toward-puts

http://www.hedgeweek.com/features/cboe/cboe-extends-vix-and-spx-options-trading-hours-global-growth-vix-continues-build

http://www.reuters.com/article/2015/06/15/derivatives-markets-regulations-idUSL5N0Z11YH20150615

http://www.cboeoptionshub.com/2015/06/12/the-weekly-options-news-roundup-6122015/

http://www.bankingtech.com/327212/derivatives-exchanges-slam-regulators-over-open-clearing/

http://www.globalresearch.ca/deutsche-bank-ceos-shown-door-worlds-largest-holder-of-derivatives-in-trouble/5455296

http://www.bloomberg.com/news/articles/2015-06-12/u-s-index-futures-fall-on-greece-woes-as-twitter-t-mobile-gain

http://www.marketwatch.com/story/traders-gird-for-a-big-shift-in-market-mood-as-twitter-gets-up-off-the-mat-2015-06-12?dist=beforebell

http://www.thetradenews.com/news/Trading_Venues/Exchanges/CME_stopped_the_flash_crash,_says_exchange_rival.aspx?l=tl

http://www.tradersmagazine.com/news/options/may-options-volume-falls-to-3041m-down-71-percent-from-april-tabb-113987-1.html

http://www.bloomberg.com/news/articles/2015-06-12/waning-u-s-stock-volatility-points-credit-suisse-toward-bubble