http://www.tradersmagazine.com/news/bats-and-direct-edge-get-sec-approval-for-merger-112045-1.html

http://uk.reuters.com/article/2014/01/31/uk-usa-europe-regulations-derivatives-idUKBREA0U1HA20140131

http://www.fointelligence.com/Article/3304243/CBOEs-Vix-faces-competition-from-ISEs-VolDex.html

http://www.mlex.com/special/496074.pdf

http://www.thetradenews.com/news/Asset_Classes/Derivatives/FIA_chief_urges_pragmatic_approach_to_SEF_trading.aspx

https://theoptionsinsider.com/industry/?p=100030238&qcABC=1

http://www.tradersmagazine.com/news/commentary-hfts-get-a-lobbying-group-of-their-own-112043-1.html

http://online.wsj.com/news/articles/SB10001424052702303973704579350810774002646

http://www.futuresmag.com/2014/01/30/finding-protection-in-choppy-markets?t=options

http://www.bloomberg.com/news/2014-01-30/chipotle-not-too-hot-for-bulls-after-79-annual-advance-options.html

http://blogs.marketwatch.com/thetell/2014/01/29/its-economics-101-says-directedge-ceo-on-maker-taker-trading-debate/

http://www.tradersmagazine.com/news/options-report-nasdaq-plans-to-cut-options-trading-costs-sparks-outrage-112039-1.html