http://www.ft.com/intl/cms/s/0/b3ab6294-c57c-11e3-97e4-00144feabdc0.html?siteedition=intl#axzz2zcSFkTNH

http://marketsmedia.com/fragmentation-vexes-options-market/

http://www.elliottwave.com/freeupdates/archives/2014/04/21/Hedge-Funds-Wounded-in–Diabolical–Stock-Market.aspx#axzz2zcOuj472

http://www.businessweek.com/news/2014-04-22/bears-tightening-grip-on-facebook-after-buyout-binge-options

http://www.cboeoptionshub.com/2014/04/21/listening/

http://www.bloomberg.com/news/2014-04-21/u-s-index-futures-are-little-changed-after-s-p-500-jump.html

http://www.wired.com/2014/04/michael-lewis-on-how-the-geeks-rigged-the-stock-market/

http://blogs.wsj.com/moneybeat/2014/04/21/options-market-predicting-big-move-in-netflix-shares-this-week/

http://www.efinancialnews.com/story/2014-04-21/countdown-to-a-new-era-in-otc-derivatives-trading?ea9c8a2de0ee111045601ab04d673622

http://nypost.com/2014/04/20/struggling-nyse-lobbies-against-high-frequency-trading/

http://uk.reuters.com/article/2014/04/21/uk-insidertrading-appeal-idUKBREA3K04D20140421

http://www.bloomberg.com/news/2014-04-18/bofa-nyse-brokerages-sued-in-high-frequency-trading-case.html