http://www.nasdaq.com/article/trader-accused-in-flash-crash-accused-rivals-of-misconduct-20150513-01468

http://www.cboeoptionshub.com/2015/05/14/blogging-options-cboe-morning-update-5-14-15/

http://www.tradersmagazine.com/news/ecns_and_exchanges/bats-intensifies-price-war-in-currencies-to-build-market-share-113860-1.html

http://www.institutionalinvestor.com/article/3452184/banking-and-capital-markets-corporations/ices-jeffrey-sprecher-has-built-a-global-trading-powerhouse.html#.VVScEpMm8yq

http://www.bloomberg.com/news/articles/2015-05-13/cftc-s-cross-border-power-would-face-curbs-under-u-s-house-bill

http://www.bloomberg.com/news/articles/2015-05-14/india-s-vix-advances-after-foreigners-buy-options-for-fifth-day

http://www.wsj.com/articles/volatility-for-stocks-stays-in-check-1431559533

http://www.bloomberg.com/news/articles/2015-05-14/momentum-stocks-seen-waning-as-u-s-markets-show-more-volatility