http://www.reuters.com/article/2013/04/18/us-exchanges-nysebqt-idUSBRE93H13H20130418

http://www.fool.com/investing/general/2013/04/18/microsofts-immovable-object-needs-an-unstoppable-f.aspx

http://www.forbes.com/sites/greatspeculations/2013/04/18/money-pours-into-pepsico-calls-illumina-options-light-up-before-earnings/

http://www.reuters.com/article/2013/04/19/usa-forex-aussieoptions-idUSL2N0D420720130419

http://www.nasdaq.com/article/options-volatility-at-earnings-season-cm238334#.UXBYwMrwpsw

http://online.wsj.com/article/BT-CO-20130418-714471.html?mod=googlenews_wsj

http://blogs.barrons.com/focusonfunds/2013/04/18/fear-index-surging-this-chart-says-its-a-speed-bump/?mod=yahoobarrons

http://www.tradersmagazine.com/news/automated-trading-in-new-sec-chair-crosshairs-111105-1.html

http://www.etftrends.com/2013/04/low-volatility-etfs-still-thriving-as-market-wobbles/

http://www.dailyfx.com/forex/market_alert/2013/04/18/Volatility_Readings_Signaling_Systemic_Changes_for_Stock_Gold_FX.html

http://www.fool.com/investing/general/2013/04/17/how-the-worlds-smartest-investor-lost-his-way.aspx

http://www.bloomberg.com/news/2013-04-18/sec-to-move-past-financial-crisis-cases-under-new-chairman-white.html