http://www.forbes.com/sites/greatspeculations/2014/04/08/nasdaq-omx-gets-approval-for-european-clearing-house/

http://www.fool.com/investing/general/2014/04/07/3-signs-the-dows-drop-is-just-a-dip.aspx

http://www.bkassetmanagement.com/featured/forex-traders-beware-of-new-lows-in-option-volatilities_6775/

https://theoptionsinsider.com/industry/?p=100033553&qcABC=1

http://www.businessweek.com/news/2014-04-08/vix-jumps-19-percent-as-losses-worsen-below-surface-of-s-and-p-500-options

http://blogs.wsj.com/cfo/2014/04/08/nearly-half-of-dodd-frank-rules-still-unwritten/

http://www.businessweek.com/news/2014-04-07/technology-traders-hit-exit-as-puts-trade-most-since-flash-crash

http://articles.marketwatch.com/story/how-to-profit-from-high-frequency-trading-2014-04-07?link=MW_story_latest_news

http://dealbook.nytimes.com/2014/04/07/high-frequency-trading-falls-in-the-cracks-of-criminal-laws/?_php=true&_type=blogs&_r=0

http://nypost.com/2014/04/06/high-speed-trading-has-to-change-hft-proponent/

http://online.wsj.com/news/articles/SB10001424052702304819004579485802535742802

http://in.reuters.com/article/2014/04/06/us-nasdaq-omx-shareprice-barrons-idINBREA350MV20140406