http://www.broadwayworld.com/bwwgeeks/article/The-Options-Industry-Council-Announces-April-Volume-Down-4-Percent-20140501#.U2OSQ1dQ5LM

http://www.bloombergview.com/articles/2014-05-01/the-strange-death-of-volatility

http://www.cnbc.com/id/101633603

http://www.marketwatch.com/story/nyse-fined-45-million-over-repeated-failings-sec-says-2014-05-01?mod=BreakingNewsMain&link=sfmw

http://marketsmedia.com/ice-options-exchanges-heat/

http://www.bloomberg.com/news/2014-04-30/pr-newswire-reaches-deal-with-scheiderman-in-hft-probe.html

http://www.cboeoptionshub.com/2014/04/30/know-macro-attack-micro/

http://www.reuters.com/article/2014/04/29/cme-group-precious-idUSL2N0NL1JH20140429

http://www.reuters.com/article/2014/04/30/us-regulation-summit-privateequity-idUSBREA3T11F20140430

http://www.bloomberg.com/news/2014-04-30/u-s-swap-overseers-flirt-with-union-as-salaries-squeezed.html

http://www.chicagotribune.com/business/sns-rt-us-cme-outage-glitch-exclusive-20140430,0,3840230.story

http://www.tradersmagazine.com/news/viewpoints/hft-hype-should-give-way-to-serious-market-discussion-experts-say-112411-1.html