https://theoptionsinsider.com/tradingtechnology/?p=100034051&qcABC=1

http://www.cboeoptionshub.com/2014/04/16/historical-perspective-current-vix-levels/

http://www.thestar.com.my/Business/Business-News/2014/04/17/Lessons-from-CME-trading-outage-Analysis-reveals-traders-have-largely-succeeded-in-replacing-machin/

http://www.moneycontrol.com/news/market-news/new-nse-equity-derivative-rules-may-reduce-volatility_1070370.html

http://www.bloomberg.com/news/2014-04-17/high-frequency-fightback-starts-in-foreign-exchange-currencies.html

http://in.reuters.com/article/2014/04/16/markets-highspeed-investigation-idINL2N0N824C20140416

http://www.automatedtrader.net/news/at/149920/nasdaq-omx-expands-london-presence

http://www.reuters.com/article/2014/04/16/us-sec-exams-cybercrime-idUSBREA3F1V820140416

http://www.reuters.com/article/2014/04/16/us-banks-commodities-fed-idUSBREA3F1QA20140416

http://www.bloomberg.com/news/2014-04-17/high-frequency-fightback-starts-in-foreign-exchange-currencies.html

http://www.bloomberg.com/news/2014-04-16/how-a-56-year-old-engineer-s-45-000-note-loss-spurred-sec-probe.html

http://www.businessweek.com/news/2014-04-16/russell-investments-bought-stock-protection-before-s-and-p-500-slide